1Flame Retardant: Made of ABS flame retardant material, resistant to high temperatures and deformation, ensures durability for long term use. 2Embedded Installation: 10 pieces of magnetic reed switches are designed for alarm systems. Widely used for alarm systems on window, doors, and cabinets contacts. 3Switch Specifications: Operates on 0.5A maximum switch current, DC 100V voltage, 10W rated power. It has a functional range of between 15mm to 20mm. 4Normally Closed: NC represents normally closed function, circuit conducts when magnets are drawn together (light on), circuit disconnects when magnets separate (light off). 5Wide Application: Suitable for all access control and anti theft alarm systems. Can be installed on wooden or aluminum alloy doors and window. 10 x Pairs of Reed Switch