Description:5pcs MC-38 Recessed Wired Door Window Sensor Magnetic Switch Home Alarm System. Recommendations in application: wooden door, window. Easy installation, reliable performance. Features:Good characteristic of abrasion-proof.Best choice for you to protect family.Switch Pattern: NC (normally closed type), circuit is connected when magnet closes to the switch.Mounting Method: SMD (by double-sided tapes).Specifications:Condition: NewVoltage: 100~110V DCRated Power: 10WContact Capacity: Maximum switch current 0.5AmpActuation Distance: 12~24mmMaterial: Nd magneticHousing Material: ABSRecommendations In Application: Window, wooden doorColor: WhiteLine Length: Approx. 32.5cm / 12.8inSingle Size: Approx. 2.8 * 1.5 * 0.9cm / 1.1 * 0.6 * 0.4inWeight: Approx. 62gPackage Includes:5 x Recessed reed switchNote:1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.