ITEM NAME:Recessed Magnetic Window/Door Contacts Security Alarm Switch Reed w/Adhesive M&O Description The reed switch is operated by an applied magnetic field. It is in Small size. Features: Switch Type: NC (normally closed type), circuit is connected when magnet closes to the switch Mounting Nethod: SMD (by screws or double-sided tapes) Product Parameters: Voltage: 100 V DC Rated Power: 10W Maximum working current: 0.5Amp Actuation distance:18mm ± 6mm Material: Nd magnetic Housing Material: ABS Wire lead: 22 Awg, 300mm long Color: white Dimensions: 27(mm)X14(mm)X8(mm) Package Includes: 1/5X Recessed Reed switch Recommendations in application: window, wooden door.The reed switch is operated by an applied magnetic field. It is in Small size. 1/5X Recessed Reed switch. Switch Type: NC (normally closed type), circuit is connected when magnet closes to the switch.