Description
- Work with 433MHz home and business security alarm system
- Fix the windowdoor sensor to the door (2 side), and make sure when the door or window are closed, they can be leaned together. If the doors or windows are opened,the 2 parts of the door sensor are separately, then it will send singal to the main unit( alarm system) to trigger the alarm and then send alert to your phone!
- Package included: 2pcs Window/Door sensors
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Pack of 2 Windows Doors Sensors for Wireless & GSM Home Security Alarm System It has compact, small and innovative design, giving you all-round security Easy to operate and install Lithium Metal button battery 3v/215mAH for door contacts (battery already included in the sensor)
