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KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems

KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems by Amazon.co.uk

Price last update: 12/06/2025

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• Designed to detect if a door/window or anything it is affixed to is open or closed. When the transmitter is separated from the magnet more than 1cm, the sensor will instantly send an alert signal to the host it is paired with to alarm.
• Compatible with ALL KERUI ALARM SYSTEM. The D022 door/window contact runs on 433MHz radio frequency, and it needs a home and business security system base unit to be paired with in order to operate, cannot work alone.
• Communication distance from the base unit is up to 250 feet away unobstructed. The antenna can be drawn out to maximize its transmission range.
• Battery operated with one (1) 23A 12V battery (Included), easy to mount with double-sided tape (Included).
• Low Battery Indication. When the battery run low, LED 2 will turn on red and stay on, to notify you that the battery needs changing otherwise it could not function properly.

Description

The Kerui 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems is an essential component of any home security system. This product is designed to detect if a door/window or anything it is affixed to is open or closed. When the transmitter is separated from the magnet more than 1cm, the sensor will instantly send an alert signal to the host it is paired with to alarm. This product runs on 433MHz radio frequency, which is compatible with all Kerui alarm system. The D022 door/window contact runs on this frequency, and it needs a home and business security system base unit to be paired with in order to operate, cannot work alone.

Communication distance from the base unit is up to 250 feet away unobstructed. The antenna can be drawn out to maximize its transmission range. The battery-operated nature of this product means that it requires one 23A 12V battery which is included. When the battery runs low, LED 2 will turn on red and stay on, to notify you that the battery needs changing otherwise it could not function properly. The battery should be changed at least once every six months to ensure optimal performance.

The installation method of this product is self-adhesive. When the sensor is separated from the magnet more than 1cm, LED 2 will turn on red and stay on, to notify you that the battery needs changing otherwise it could not function properly. The product has a low battery indication which LED 2 will turn on red and stay on when the battery runs low. When the sensor is separated from the magnet more than 1cm, it will instantly send an alert signal to the host it is paired with to alarm. When the battery needs changing, LED 2 will turn off and stay off.

The product is brand new and comes in white color. It has a power source of battery-powered which makes it easy to install and use. When the battery needs changing, LED 2 will turn off and stay off. The Kerui 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems is an essential component of any home security system and runs on 433MHz radio frequency. It is compatible with all Kerui alarm system, runs on this frequency, and cannot work alone.

Overall, the Kerui 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems is an excellent choice for any home security system. It is easy to install, requires minimal effort and has a low battery indicator LED 2, which helps to ensure optimal performance of the product. This product is highly recommend for any home security system user.