Voltage of a LED-pushbutton

Basically all Metzler bell buttons with LED illumination are designed for a very wide voltage range of 6-24V AC/DC. The LED can be supplied by integrated rectifiers and voltage reducers.

This corresponds to common doorbell installations in Germany. You can either use a bell transformer (usually in the fuse box) or a door bell with integrated bell transformer.

The LED illumination of the pushbuttons does not have to be operated with 230 V AC! There is a danger of electric shock!