when you press the key on the transmitter, the self-powered coils of the inner module will be moved. it can transfer the kinetic energy into electrical ene...
wireless doorbell battery 12v zinc manganese 23AProduct overviewType : Alkaline High Voltage BatteryChemical System : Zinc/Manganese DioxideNominal Voltage : 12.3VNom...
PH3-3907B wireless music doorbell new type (BATTERY TYPE )1) · Suitable for homes, office installed in or outdoors buildings and ships etc.
2) · 25 sounds selectable at either tran...
WIFI Shop Door Bell , Nautical door bell wholesale wifi video door bell WIFI Video Door Bell :Product Description:
1. With bottom calling button;2. With rain-proof cover;3...
Indoor monitor:Model: M2107BCCBasic 7"LCD Color Monitor with touch buttonHands-free villa video door phone4 wires connectionIntercom functionDoor monitoring functionLock con...
High quality android and Iphone wiless door bell for WIFI Video Door Bell :1. With bottom calling button;2. With rain-proof cover;3. With unlock function(sui...