What advantages does our alarm for doors when opening have?
1)Protect safety and anti theft
2)Portable to carry when travel
3)Easy to pass through security check when board on planes
4)Superior resistant
5)Installation and disassembly in seconds
6)No drill and harmless installation
Features:
1)Door stop alarm:1 pc
2)Batteries: 3V batteries 4 pcs(2 pcs backup)
3)Size:3.46"L x 1.57"W x 4.72"Th
4)Weight:11.52 ounces