Description:1.Self-Adhesive Mount, Screw Surface Mount contact, ABS Housing. Long wire lead that can side mounted.2.Switch Type: NC means Normally Closed:When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ).3.Work as an anti-theft alarm, perfect for wood door and window. Specification:Product Name: Magnetic Door SwitchModel: MC-38Contact Type: NC (Normally Closed)Actuation Distance: 10-15mmMax. Current: 0.5AMax. Power: 10WWorking Voltage: DC100VEach Size(Approx): 27 x 14 x 7.5mm / 1.06-inch x 0.55-inch x 0.3-inch (L*W*H)Mounting Hole Diameter: 4mm/0.16-inchCable Length(Each): 26cm / 10.24-inchMaterial: ABS (Housing)Wire Type: 1007UL#24AWGColor: WhiteNet Weight: 22g Package Content:2pcs x Magnetic Door Switch, Some Install Parts Note: Door magnetic induction can only provide a switch signal, which can not directly load the power, nor directly connect the lamp!1.NO means Normally Open: when the magnet separate, the circuit is conductive( light on );When the magnet together, the circuit is not conductive ( light off ).When make order,pls check carefully! 2.NC means Normally Closed: when the magnet separate, the circuit is not conductive( light off );When the magnet together, the circuit is conductive ( light on ).When make order,pls check carefully!