Bell push button is under kinetic technology, no need battery.
Bell push lifetime is over 200,000 times of press.
Bell push is IP44 waterproof, with LED indicator.
Bell push is with name plate holder design
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, with LED indictor, and name plate holder
● 32 sounds selectable, 4-level volume control
● Self-learning function avoid any interference
● Receiver is powered by 220V with US plug,bell push button is no battery required