When actuated, the pushbutton sends to the actuators of the comfortable electrical installation. LEDs indicate if the signal has been sent, understood correctly and if a confirmation has been returned, but doe not give any feedback about the actual switching state of the actuator. There is no difference between blind dimmer, etc. or two-way, crossover switches or blind pushbutton, etc. necessary. the device is powered with a round cell battery and can therefore easily be mounted anywhere (screwed and glued). NO switch, branch or installation box is required due to the flat design . the pushbutton is compatible with many 55 mm frames from the switch industry (observe the compatibility list). battery included as standard.