Feature:1. Premium Material: Magnetic switch is made of flame retardant ABS material, wear resistant, fireproof, safe, sturdy and durable.2. Excellent Performance: High magnetic magnet and premium reed switch , door magnetic switch with high sensitivity, high efficienvy.3. Normally Open Closed: Normally closed function is when the switch is connected in combination, the switch is disconnected in separate state. The opposite of normally open.4. Simple Installation: The installation is simple, come with 4pcs screws, no complicated operation is required, convenient for using.5. Wide Application: Magnetic reed switch is suitable for wooden door, window, metal doors, gates and any other, has a wide range of application.Specification:Item Type: Magnetic Door SwitchMaterial: ABSApplication Range: Door frame, wall, doorConnection Mode: Screw wiring connectionOutput Type: Normally open normally closed (NO/NC)Induction Distance: Approx. 20-30mm/0.79-1.18inInstallation Method: Open mounted screw installationCurrent: 0.5AVoltage: 10VPower: 10WSize(Unilateral): Approx. 55x13x11mm/2.17x0.51x0.43in.Package List:2 xMagnetic Door Switch4 x Screw