Chuông cửa không dây cảm biến chuyển động chống trộm

Decription: Feature: Material:ABS+Electronic component Size:Length:6.2cm Power Supply:3 x 1.5V LR44 Button Batteries(included) Siren loudness:90 dB Magnetic sensor switch detects entry Ideal guardian against the unwanted intruder whether you are in or out, keep yourself and your property safe and security Easily attach the main sensor on the door/window and attach the stick adjacent the main sensor on the door/window frame with the adhesive tape (included) Handy ON/OFF switch: in the state of "ON", the sensor will emit the alarm signal as long as someone opens your door or window Super loud 90 dB alarm Notice: Due to the different monitor and light effect,the actual color maybe a slight different from the picture color. Please allow 0.5-1cm differs due to manual measurement . Included: 1 x Alarm Unit 1 x Magnetic Sensor