Feature: 1. NC Design: The NC means normally closed design signifies that when the magnets are attracted to each other, the circuit switches on, and when separated, the circuit switches off. 2. Switch Specifications: Operates on a current of 0.5A and voltage of 100V. It possesses a rated power of 10W and a functional range of between 30mm to 50mm. 3. Durable and Sensitive: Features a zinc alloy shell and magnet construction for excellent rust resistance, strong magnetism, responsive operation, and durability. 4. Wide Application: The rolling door contact magnetic reed switch is ideal for door and window alarm systems in various places such as garages, industrial warehouses, and shops. 5. Simple Installation: Typically installed on stable doorframes with corresponding components fixed on doors. The installation process is simple and hassle free. Specification: Item Type: Rolling Door Contact Magnetic Reed SwitchMaterial: Zinc alloys, magnets.Current: 0.5ARated Power: 10WSwitch Type: NC, when the magnets are drawn together, the circuit is on (the light is on), and when the magnets are separated, the circuit is not on (the light is off) Package List: 1 x Rolling Door Contact Magnetic Reed Switch1 x Magnet Block4 x Screw1 x Manual