1)Easily mounted by ahdesive tape;
2)Magnetic sensor switch detects entry for protecting your home or office;
3)Opetrated by 3 pcs 1.5V button cell;
4)Alarm volume: >=90dB
1)Easily mounted by ahdesive tape; 2)Magnetic sensor ; 3)Opetrated by 3 pcs 1.5V button cell; 4)Alarm volume: >=90dB