Package Content: 2Sets x RC-32 Magnetic Door Switch, a package of screws for mounting on wood only. Switch Size(Approx): 64*13*13mm / 2.52" x 0.51" x 0.51"(L*W*H), Hole Dia: 4mm / 0.16", Contact Type: NC/NO/COM Transmitting Distance: 15-25mm, Rated Power: 10W, Max Voltage: 100V, Max Current:0.5A. This switch contains normally closed and normally open contacts, great for alarm,LED,Relay,GPS low voltage devices...etc, ideal wooden door or window use. Great for sensor with sliding rear window, Effective for Theft Deterrence., Weight: 0.110231131 pounds, Manufacturer: Aoje Link-Electric