These wireless door/window magnetic sensors are used to protect the opening of both doors and windows. If a burglar opens the protected door or window, a magnetic switch inside the sensor, will trip, which sets off the security system. Install one at every entrance to make sure your home is protected. Each sensor is supervised (self-checking) for professional reliability and offers you choice in design and performance. It will work with most standard security system which is using 433MHz receiver. LED Indicator: Pull out the antenna of the magnetic detector: When the door or window is opened from the closed position, LED 1 will turn to red for 2 seconds, the magnetic detector will be triggered and will send alarming signal to the main unit. Indication of low battery: When the voltage of battery is less than 7.5V, LED 2 will straightly turn on red light. At this time, you need to replace a new battery immediately. Specification: Power Requirements: DC=12V-8.4V (23A DC=12V Battery Included) Current Consumption: less than 20uA; less than 15mA while transmitting Transmit Frequency: 433MHz Transmit Duration: less than 1s Transmit Distance from host: more than 80m (no obstacle) Installation: less than 15mm between part A and part B Coding Type: Fixed Code Dimension (LWH): 71x36x15mm Operating Temp: -10 ~ +40 centi degree Humidity: less than 90% Shell Color: White Package Included: 2x Magnet Sensor 2x Battery 2x Double-sided Stickers
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