1、NC Type: With a normally closed design, when the switch is close to the magnets, the circuit conducts (light on); When the switch is separated from the magnets, the circuit is non conductive (light off) 2、Sensing Distance: Recessed magnetic door sensor, with a transmissing distance of 10‑20mm, featuring fast reflection, accurate detection and stable performance, greatly improving efficiency 3、Working Conditions: When the switch is powered on, the voltage should be controlled at AC220V, the load current not exceed 500mA, and the maximum power is 10W. It will only be magnetic after being powered on 4、Applicable Range: Provides 2 pairs of magnetic door sensors, suitable for all home security system, access control, and antitheft alarm system; Can be installed on wooden or aluminum alloy door and window 5、ABS Plastic Case: The magnetic switch casing is made of excellent ABS material, has high strength, high temperature resistance, no deformation, long service life, and is suitable for more scenarios