Technical Parameter:1. Suitable for door thickness : 35~50mm2.
Power supply: 4 LR6 (AM3, AA)1.5V alkaline batteries3. Service life
of battery: approx. 20,000times4. It will alarm for low power
supply, and still can open for approx. 50 times. Packing: Qty/Ctn:
8pcsMeas/Ctn: 47.5x35.x30cmWeight/Ctn: 18kgs