ITEM NAME:10 x Door or Window Contact Magnetic Switch Alarm - SMD Style, White A7W2 10 x Door or Window Contact Magnetic Switch Alarm - SMD Style, White A7W2 100% Brand New High-quality contacts, UL wire leads Installation method: SMD (by screws or double-sided adhesive tapes) Easy to install Switch Type: (normally open type)The switch is close to the magnet signal disconnect. Contact Capacity: Maximum switch: 0.5A voltage: 100V power: 10W operating distance: 15-25mm Housing: ABS Dimensions: 27mm x 14mm x 9mm cable dimension: 16.75 " Color: White recommendations in the application: wooden door,window.