Bell push button is under kinetic technology, no need battery
Bell push life time is over 200,000 times of press
Bell push is IP44 waterproof, with LED indicator
32 melodies, 4 level volume control
Upto 150 meters operation range(open air)
"self-learning technology avoid interference
● Wireless Plug-in Doorbell with Kinetic bell push (no battery required).
● Operating distance up to 100 metres on open air.
● Bell push with waterproof IP44 rate and with LED indictor.
● 32 sounds selectable on chime, 4-level volume control
● Self-learning function avoid any interference
● Receiver is powered by 220V with US plug, bell push