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