CASAcontrol
Battery-free wireless doorbell, 2 socket receivers, 36 tones, IP44

ready for use anywhere in the blink of an eye: The kinetic bell push button requires neither batteries nor cables. It uses the energy that is generated when it is pressed. So you simply place it wherever you need it. And you plug the two receivers into the socket in the rooms where you are. That's it!

Sound signal according to your wishes: choose from 36 ringing signals from traditional to musical classics. Set your preferred volume with up to extra loud 95 dB. You'll always be optimally notified. Also ideal for people with hearing problems.