Wireless pushbutton F4T55E- 55 x 55 mm without battery or wire

Wireless 4-way pushbutton F4T55E- in E-Design55, 80 x 80 mm external dimensions, internal frame dimensions 55 x 55 mm, 15 mm high. Generates the power for wireless telegrams itself when the button is pressed, therefore there is no connecting wire and no standby loss. With double rocker. Smart Home sensor.