The Wireless Self-powered Doorbell Push runs from kinetic energy with no batteries and wire required, up to 500FT range in the open space. The chime speaker is also pre-programmed with 52 selectable melody chimes for quick and easy set-up.

Main Features:

Stylish modern design fits into any home and office 

Kinetic doorbell push - NO batteries required – fit and forget (maintenance free) 

52 ringtones(16 chord)to choose from and 4 steps volume control(25~110dB) 

Simple to use and easy-to-install without the hassle of running any wires 

With up to 500FT operating range in open space,100m audible range 

IP55/IP44 waterproof transmitter 

Eye-catching indicators alert you when the doorbell can't be heard 

Expandable, allowing you to pair various transmitters to the receiver

Using learning code to prevent interference from other wireless transmitters 

Easy to choose your change and select your favorite ringtone with forward and backward button 

Smart memory, automatically save selected ringtone after a power outage 

High quality, approved with CE,FCC,RoHS certification