we are manufacturer of auto security system since 1997,CE,FCC,ISO9001 Approved. LD005 TECHNICAL DATE: ... Parameter Conditions1. PUSH/PULL FORCE ≥4.5kg2. Voltage DC12V3. Operate life ... household burglarproof device, adhering to philosophy of“Technology is drive of products, service is source of market”, Nengtong Electronic puts customers’ ...