A wireless, square, plug-in doorbell with a kinetic bell push is a doorbell system that uses radio waves to communicate between the button and the chime, and the bell push generates power through kinetic energy, eliminating the need for batteries. The bell push is typically weatherproof and has an LED indicator, while the chime unit plugs into a standard wall outlet.

SPECIFICATION:

• Operating range up to 100 metres on open air. 
• Bell push with waterproof IP44 and LED indictor. 
• 32 sounds selectable on chime,4 level volume adjustable. 
• Self-learning function avoid any interference
• Receiver is powered by 220V with US plug,bell push button is selfpower, no need battery.