Wireless Windows Doors Sensor Work with Any 433MHz Home Security Alarm System for Home and Business 2 Pack

LED Indicator: 1. Pull out the antenna of the magnetic detector: When the door or window is opened from the closed position, LED 1 will turn to blue for 2 seconds, the magnetic detector will be triggered and will send alarming signal to the main unit. 2. Indication of low battery: When the voltage of battery is less than 7.5V, LED will straightly turn on blue 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): 65x26x65mm Operating Temp: -10 ~ +40 centi degree Humidity: less than 90% Shell Color: White Package Included: 2 x Door sensor (Including battery) 2 x Double-sided Stickers