Wireless and battery-free push button, Eltako 4-channel.

Wireless, battery-free push button. With a single rocker installed, 2 different channels can be controlled, and with a double rocker, 4 channels can be controlled. Range inside 30 meters through 1 wall of wood or plaster, 20 meters through 2 walls of wood or plaster, 10 meters through 1 concrete wall. Outdoor range up to 100 metres with free visibility and no interference factors. Supplied with single rocker, double rockers, attachment plate, wireless/battery-free transmitter module, and double-sided adhesive foil.