Universal dimmer switch, Power MOSFET up to 300W. Automatic lamp detection. Standby loss only 0.7 watts. Minimum brightness or dimming speed adjustable. With children's room, snooze and light alarm switch. Also with light scene control. Encrypted radio, bidirectional radio and repeater function can be switched on. For recessed mounting. 45mm long, 45mm wide, 33mm deep. Universal dimmer switch for lamps up to 300W, depending on the ventilation conditions. Dimmable 230V LED lamps and dimmable energy-saving lamps ESL also dependent on the lamp electronics and the dimming type. Zero-crossing switching with soft on and soft off to protect the lamp. Local supply, switching and control voltage 230V. No minimum load required. The set brightness level is saved when switched off (memory). In the event of a power failure, the switch position and brightness level are saved and, if necessary, switched on when the supply voltage returns. Automatic electronic overload protection and overtemperature shutdown. Encrypted sensors can be taught in. Bidirectional radio and/or a repeater function can be switched on. Every change in status and incoming central control telegrams are then confirmed with a radio telegram. This radio telegram can be taught in other actuators such as FSR61NP-230V, Professional Smart Home Controller and universal displays. The current dimming value is also displayed in the respective app in %. The upper %/dim speed rotary switch can be used to set either the minimum brightness (fully dimmed) or the dimming speed. The lower rotary switch determines during operation whether automatic lamp detection should work or special comfort positions: AUTO allows dimming of all lamp types. LC1 is a comfort position for dimmable 230V LED lamps which, due to their design, cannot be dimmed far enough to AUTO (trailing edge phase control) and therefore have to be forced to leading edge phase control. LC2 and LC3 are comfort positions for dimmable 230V LED lamps like LC1, but with different dimming curves. EC1 is a comfort position for energy-saving lamps which, due to their design, have to be switched on with a higher voltage so that they can be safely switched on again when dimmed down even when cold. EC2 is a comfort position for energy-saving lamps which, due to their design, cannot be switched on again when dimmed down. Therefore, memory is switched off in this position. Inductive (wound) transformers must not be used in the LC1, LC2, LC3, EC1 and EC2 positions. In addition, the maximum number of dimmable LED lamps can be lower than in the AUTO position due to the design. The buttons can be programmed either as directional buttons or as universal buttons: As a directional button, one side can be switched on and dimmed up, and the other side can be switched off and dimmed down.A double click on the switch-on side triggers automatic dimming to full brightness at dim-speed. A double click on the switch-off side triggers the snooze function. The children's room function is carried out on the switch-on side. As a universal button, the direction is reversed by briefly releasing the button. Light scene control, light alarm function, children's room function and snooze function according to the operating instructions. The LED accompanies the programming process according to the operating instructions and indicates radio control commands during operation by flashing briefly.