Inserts are supplied including a rocker/cover and protective cover. Fastening using screws or spreading claws - inserts for screw fastening can be retrofitted with spreading claws Order No. 6650 99. Connection using plug-in (SL) or screw terminals (SK). Possible functions: illuminated double button, illuminated double changeover switch. Supplied with 2 LED units Order No. 6650 90 in the double button function.