DESCRIPTION Save power design, low power indicated, It is widely used for monitoring and security  system, with high reliability, small size, easy installation and operation and strong flexibility.  It is including one transmitter part and one magnetic part, when the door or window is  open, it will be triggered and immediately sends out wireless signal to main alarm system  to warning. Installing place: door, window, draw,cabinet and so on.  SPECIFICATION:  1. Triggered distance :10mw 8. Frequency tolerance?0.2MHz 9. Operating temperature: indoor -10 ~ 50, related humidity d 95% 10. Power: standby :0.01W, Alarm :0.09W 11. Size: Transmitter part: 90 mm(L)?55 mm(W)?22 mm(H)  Magnetic part: 60mm(L)??15 mm(W)?13 mm(H). Weight: 50g INSTALLATION: 1. You should fix the transmitter part on the doorcase, magnetic part on the  motion door separately by adhesive, The Led of the transmitter part should near to the  magnetic part. 2. The distance between the transmitter part and the magnetic part should be no more than 1cm. 3. It means OK if the Signal LED flashes for 1 second after installation. 4. The signal red LED flash for 1 second to alarm,The low battery green LED  lights all along which means batter power is not enough. Please replace the same size  new battery 5. Antenna is suggested to pull out.