Customizable Classic House Hotel Office Self-Power Non Battery Waterproof Audio Only Doorbell

Self-Powered Wireless Doorbell
A Battery-free wireless doorbell,just press the button to generate power and a wireless signal will be driven.
The core principle of self generating wireless doorbell is an energy conversion mode. The closed conductor cuts the magnetic line of force to produce current.
Easy and DIY Installation
Transmitter can be placed or moved at will,or it can be fixed in your favorite position. Plug-in the Receiver to any electrical outlet.

38 Melodies to choose
The battery-free wireless doorbell offers 38 different ringtones with 3 levels of adjustable sound volume on your choice.
Ranging from classic doorbell chimes to rhythmic tunes to suit anyone
Wireless Doorbell Receiver with LED Indicator
The LED on the receiver will light up when the transmitter is pressed, good notification for the elderly with hard of hearing or when in mute mode ,you can always receive an alarm.