Home Safety Burglar Alarm Wireless System Security Device Door Window Sensor

Brand: KERUI Sold By: TopSelected
Out of Stock
Ships from United States Arrives in 7-14 business days

Free Standard Shipping on orders over 89

Item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Delivery:
31
July2026
-
11
August2026
Home Safety Burglar Alarm Wireless System Security Device Door Window Sensor

Home Safety Burglar Alarm Wireless System Secur...

$38.90

Product Details

KERUI 300FT 120DB Wireless Door/Window Sensor Alarm Anti-Theft Door Alarms Remote Control for Home Safety Security

🧡 Multiple Modes Can be Chosen

Normal Alarm Mode

When the door or window is opened, the alarm will last one minute no matter the door or window is closed or not.

Alarm And Stop Mode

It will alarm when the door or window is opened, and will stop alarm once you close the door or window.

Doorbell Mode

This mode will sound "Ding Dong" one time if someone enters, it is suitable as a door chime for the home or office.

SOS

Click "horn" button on remote control, elderly can easily get help in an emergency.

 

🧡Long Range Remote Control

1.One remote control can pair with multiple door alarm sensor.

2.One door alarm sensor also can pair with multiple remote control.

3.You can use the remote control to arm, disarm or get emergency help.

4.The remote control can control the door alarm sensor far away from 300ft in open area.

 

🧡 EXTENSIBLE& LINKANGE ALARM

You expand your home security alarm system with more alerts or remote controls,Infrared detector, door sensor, smoke detector, gas detector, emergency button.

 

🧡 What type of battery do they use?

The alarm uses 2 AAA battery (not included ).

The remote uses a 3V CR2032 lithium battery (included).

 

🧡 Remote control button introduction

Disarm button---Switch the alarm to the disarmed state, there is no sound on this mode except for SOS. You can also press this button to stop alarming.

Alarm button---Switch the alarm to the armed state. on this mode, when the door sensor beeps once means the alarm will last 1 minute until you disarm it;  beeps three times means when the door open, it will alarm , if you close the door, the alarm will stop

Alarm mode switch button---Switch alarm mode and dingdong mode.

SOS button---Regardless of disarming or arming, press this button and the alarm will lasts for one minute unless you press “SET” button on the alarm or press "Disarm" button on the remote to turn it off early.

 

 

Door Sensor Alarm, Remote Control 300ft 120dB Wireless Door Contact Sensor Anti-Theft Door Alarms for Kids LOUDER ALERT

When the magnetic sensor is disconnected, the KERUI door and window alarm system

will issue a loud 120dB warning to prevent theft and unnecessary access, preventing your child from sneaking out.
 
 

LONGER CONTROL RANG

This wireless door alarm kit comes with a wireless remote control for arming, disarming, SOS and doorbell options.

It makes it easier to remotely control door/window alarms up to 300 feet.
 
 
MULTI-FUCNTION ALARM SYSTEM
 

You can select the doorbell mode to draw attention when people enter, as a commercial doorbell when entering.

With the SOS option, seniors can easily get help in an emergency. Good protection.
 
 

EXTENSIBLE& LINKANGE ALARM

You expand your home security alarm system with more alerts or remote controls,

Infrared detector, door sensor, emergency button.
 
You can use with the following accessories.
Note:These two accessories are not included in this package, you can buy them in other packages in our store.
 
EASY INSTALLATION
 

This anti-theft door and window alarm is easy to set up.

Simply install it with the double-sided tape provided. Take just a few minutes.
 
 
 

BATTERY REMINDER

When the battery is very low, the alarm volume will decrease and the alarm time will be shortened,

reminding you to replace the battery .
 
 

Technical Parameter

Model: KR-D121
Working voltage: 3.0V (powered by 2 AAA batteries)(the batteries are not included)
Standby current: <10uA.
Working current: <80mA.
Receiving frequency: 433MHz
Alarm time: 60 seconds
Alarm volume: 120DB
Alarm output: open the door and alarm after arming, and trigger the detector to alarm after arming
 
 

Door Sensor Alarm, Remote Control 300ft 120dB Wireless Door Contact Sensor Anti-Theft Door Alarms Kit

LOUDER ALERT

When the magnetic sensor is disconnected, the KERUI door and window alarm system will issue a loud 120dB warning to prevent theft and unnecessary access, preventing your child from sneaking out.

LONGER CONTROL RANG

This wireless door alarm kit comes with a wireless remote control for arming, disarming, SOS and doorbell options. It makes it easier to remotely control door/window alarms up to 300 feet

MULTI-FUCNTION ALARM SYSTEM

You can select the doorbell mode to draw attention when people enter, as a commercial doorbell when entering. With the SOS option, seniors can easily get help in an emergency. Good protection.

EXTENSIBLE& LINKANGE ALARM

You expand your home security alarm system with more alerts or remote controls,Infrared detector, door sensor, smoke detector, gas detector, emergency button.

Click the link below to buy accessories

EASY INSTALLATION

This anti-theft door and window alarm is easy to set up. Simply install it with the double-sided tape provided. Take just a few minutes

BATTERY REMINDER

When the battery is very low, the alarm volume will decrease and the alarm time will be shortened, reminding you to replace the battery [Not included]

 

Technical Parameter

Model: KR-D121 Working

voltage: 3.0V (powered by 2 AAA batteries) Standby
current: <10uA. Working current: <80mA. Receiving
frequency: 433MHz Alarm time: 60 seconds Alarm
volume: 120DB
Alarm output: open the door and alarm after arming, and trigger the detector to alarm after arming
 
 
Package: 
D121 door sensor host *1
Motion Detector *2
Door Sensor *2
Remote control *1
 
DataCaciques
PushAuction

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges first item USD 6.99 and additional item USD 3.0 each. Standard International Shipping from United Kingdom, Germany, Italian and Japan to the United States charges first item USD 11.99 and additional item USD 4.0 each.

Import Duty: Everymarket collects applicable duties and taxes on goods imported into the U.S. at checkout, it's calculated based on the goods value multiply by the rate. For United Kingdom and China goods is 10%, Germany, Italian and Japan goods is 15%. We are committed to making your U.S. shopping experience simple and transparent. The method of delivery—either Delivered Duty Paid (DDP) or Delivered Duty Unpaid (DDU)—depends on whether duties and taxes are collected at the time of your purchase.

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. Average transit times to the United States is 3 - 7 Business days and average transit times to International is 7 - 14 Business days 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs:
    - If your return is approved due to a defective, damaged, or incorrect item, we will provide a prepaid return shipping label at no cost.

    - If the item has no quality issues and matches the product listing and description, please contact our Customer Service team before returning it. Once your return is authorized, you must return the item according to the provided instructions. In this case, the return shipping cost is the customer's responsibility.

    - We are not responsible for return shipping costs for items returned without prior authorization.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Please contact us to get return labels.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 (800) 660-3783

  • Email: cs@everymarket.com

 

KERUI 300FT 120DB Wireless Door/Window Sensor Alarm Anti-Theft Door Alarms Remote Control for Home Safety Security

🧡 Multiple Modes Can be Chosen

Normal Alarm Mode

When the door or window is opened, the alarm will last one minute no matter the door or window is closed or not.

Alarm And Stop Mode

It will alarm when the door or window is opened, and will stop alarm once you close the door or window.

Doorbell Mode

This mode will sound "Ding Dong" one time if someone enters, it is suitable as a door chime for the home or office.

SOS

Click "horn" button on remote control, elderly can easily get help in an emergency.

 

🧡Long Range Remote Control

1.One remote control can pair with multiple door alarm sensor.

2.One door alarm sensor also can pair with multiple remote control.

3.You can use the remote control to arm, disarm or get emergency help.

4.The remote control can control the door alarm sensor far away from 300ft in open area.

 

🧡 EXTENSIBLE& LINKANGE ALARM

You expand your home security alarm system with more alerts or remote controls,Infrared detector, door sensor, smoke detector, gas detector, emergency button.

 

🧡 What type of battery do they use?

The alarm uses 2 AAA battery (not included ).

The remote uses a 3V CR2032 lithium battery (included).

 

🧡 Remote control button introduction

Disarm button---Switch the alarm to the disarmed state, there is no sound on this mode except for SOS. You can also press this button to stop alarming.

Alarm button---Switch the alarm to the armed state. on this mode, when the door sensor beeps once means the alarm will last 1 minute until you disarm it;  beeps three times means when the door open, it will alarm , if you close the door, the alarm will stop

Alarm mode switch button---Switch alarm mode and dingdong mode.

SOS button---Regardless of disarming or arming, press this button and the alarm will lasts for one minute unless you press “SET” button on the alarm or press "Disarm" button on the remote to turn it off early.

 

 

Door Sensor Alarm, Remote Control 300ft 120dB Wireless Door Contact Sensor Anti-Theft Door Alarms for Kids LOUDER ALERT

When the magnetic sensor is disconnected, the KERUI door and window alarm system

will issue a loud 120dB warning to prevent theft and unnecessary access, preventing your child from sneaking out.
 
 

LONGER CONTROL RANG

This wireless door alarm kit comes with a wireless remote control for arming, disarming, SOS and doorbell options.

It makes it easier to remotely control door/window alarms up to 300 feet.
 
 
MULTI-FUCNTION ALARM SYSTEM
 

You can select the doorbell mode to draw attention when people enter, as a commercial doorbell when entering.

With the SOS option, seniors can easily get help in an emergency. Good protection.
 
 

EXTENSIBLE& LINKANGE ALARM

You expand your home security alarm system with more alerts or remote controls,

Infrared detector, door sensor, emergency button.
 
You can use with the following accessories.
Note:These two accessories are not included in this package, you can buy them in other packages in our store.
 
EASY INSTALLATION
 

This anti-theft door and window alarm is easy to set up.

Simply install it with the double-sided tape provided. Take just a few minutes.
 
 
 

BATTERY REMINDER

When the battery is very low, the alarm volume will decrease and the alarm time will be shortened,

reminding you to replace the battery .
 
 

Technical Parameter

Model: KR-D121
Working voltage: 3.0V (powered by 2 AAA batteries)(the batteries are not included)
Standby current: <10uA.
Working current: <80mA.
Receiving frequency: 433MHz
Alarm time: 60 seconds
Alarm volume: 120DB
Alarm output: open the door and alarm after arming, and trigger the detector to alarm after arming
 
 

Door Sensor Alarm, Remote Control 300ft 120dB Wireless Door Contact Sensor Anti-Theft Door Alarms Kit

LOUDER ALERT

When the magnetic sensor is disconnected, the KERUI door and window alarm system will issue a loud 120dB warning to prevent theft and unnecessary access, preventing your child from sneaking out.

LONGER CONTROL RANG

This wireless door alarm kit comes with a wireless remote control for arming, disarming, SOS and doorbell options. It makes it easier to remotely control door/window alarms up to 300 feet

MULTI-FUCNTION ALARM SYSTEM

You can select the doorbell mode to draw attention when people enter, as a commercial doorbell when entering. With the SOS option, seniors can easily get help in an emergency. Good protection.

EXTENSIBLE& LINKANGE ALARM

You expand your home security alarm system with more alerts or remote controls,Infrared detector, door sensor, smoke detector, gas detector, emergency button.

Click the link below to buy accessories

EASY INSTALLATION

This anti-theft door and window alarm is easy to set up. Simply install it with the double-sided tape provided. Take just a few minutes

BATTERY REMINDER

When the battery is very low, the alarm volume will decrease and the alarm time will be shortened, reminding you to replace the battery [Not included]

 

Technical Parameter

Model: KR-D121 Working

voltage: 3.0V (powered by 2 AAA batteries) Standby
current: <10uA. Working current: <80mA. Receiving
frequency: 433MHz Alarm time: 60 seconds Alarm
volume: 120DB
Alarm output: open the door and alarm after arming, and trigger the detector to alarm after arming
 
 
Package: 
D121 door sensor host *1
Motion Detector *2
Door Sensor *2
Remote control *1
 
DataCaciques
PushAuction

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges first item USD 6.99 and additional item USD 3.0 each. Standard International Shipping from United Kingdom, Germany, Italian and Japan to the United States charges first item USD 11.99 and additional item USD 4.0 each.

Import Duty: Everymarket collects applicable duties and taxes on goods imported into the U.S. at checkout, it's calculated based on the goods value multiply by the rate. For United Kingdom and China goods is 10%, Germany, Italian and Japan goods is 15%. We are committed to making your U.S. shopping experience simple and transparent. The method of delivery—either Delivered Duty Paid (DDP) or Delivered Duty Unpaid (DDU)—depends on whether duties and taxes are collected at the time of your purchase.

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. Average transit times to the United States is 3 - 7 Business days and average transit times to International is 7 - 14 Business days 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs:
    - If your return is approved due to a defective, damaged, or incorrect item, we will provide a prepaid return shipping label at no cost.

    - If the item has no quality issues and matches the product listing and description, please contact our Customer Service team before returning it. Once your return is authorized, you must return the item according to the provided instructions. In this case, the return shipping cost is the customer's responsibility.

    - We are not responsible for return shipping costs for items returned without prior authorization.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Please contact us to get return labels.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 (800) 660-3783

  • Email: cs@everymarket.com

 

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