DC 12V Door Window Wireless Alarm Sensor

DC 12V 23A Smart Wireless Alarm Sensor , Door / Window Magnetic Sensor Quick Detail: Wireless magnetic door/window sensor is used to detect where the windows and doors, drawers and safes are illegal opening or moving. Description: Wireless magnetic door/window sensor is used to detect where the windows and doors, drawers and safes are illegal opening or moving. Wireless door sensor contains two parts: wireless transmitter and magnet. The wireless transmitter built-in an