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product name:wireless door detector
model:REH151R 
main features:
Power supply: 12V battery
Working frequency: 433MHz
Gap for triggered: >15 -20mm
Stand-by current: 0.01W
Alarm current: 0.09W
Working temperature: -10 degree to +50 degree
Relative humidity: < 95%
Wireless transmission distance: 80m(no barrier)
Fixed way: Tighten the screws
Size: 80x50x 16mm
Gross weight: 0.05KG
note: The buyer will bear all risk after the goods tracking informationis online,by DHL,UPS, FEDEX,TNT,EMS,not include the remote fees if your address is remote.