Universal dimmer switch, power MOSFET up to 400W. Automatic lamp detection. Minimum brightness and dimming speed adjustable. With children's room, snooze and light alarm switch as well as constant light control and master-slave operation. Also with light scene control via PC or with radio buttons. Encrypted radio, bidirectional radio and repeater function can be switched on. Standby loss only 0.7 watts. Installation in the 230V mains connection cable, for example in false ceilings and lights. 166mm long, 46mm wide and 31mm high. With cable strain relief. Universal dimmer switch for lamps up to 400W, depending on the ventilation conditions and the type of dimming. Dimmable energy saving lamps ESL and dimmable 230V LED lamps also dependent on the lamp electronics. Switching in zero crossing with soft on and soft off to protect the lamp. The set brightness level is saved when switched off (memory). In the event of a power failure, the switching position and brightness level are saved and, if necessary, switched on when the supply voltage returns. Automatic electronic overload protection and overtemperature shutdown. The upper rotary switch determines during operation whether automatic lamp detection or special comfort positions should be activated. The LED accompanies the programming process in accordance with the operating instructions and indicates control commands during operation by flashing briefly.