1Heat Resistant: Made of premium brass material, reed switch is resistant to high temperatures and deformation, ensures durability for long term use. 2Normally Closed: NC represents normally closed function, circuit conducts when magnets are drawn together (light on), circuit disconnects when magnets separate (light off). 3Functional Range: With a functional distance of 1020mm, providing fast reflection and precise detection that ensures efficient and reliable functionality. 4Working Conditions: When the magnetic gate is energized, the voltage is controlled at AC220V, and the load current cannot exceed 500mA, the maximum power is 10 W. 5Wide Application: Suitable for all access control and anti theft alarm systems. Can be installed on wooden or aluminum alloy doors and window.Specification Item Type: Magnetic Reed SwitchModel: MR-199Material: BrassConnection Method: Normally Closed (When the door magnet is drawn together, it is in a conductive state)Rated Voltage: AC220VPackage List 2 x Pair of Reed Switches