Universal rotary dimmer comfort (R, L, C, LED), soft locking, light control. Universal rotary dimmer comfort with extension input for button (normally open), single-surface operation, input for extension use for universal rotary dimmer, brightness memory, lamp-saving soft start, phase leading/trailing edge or LED phase leading edge depending on the type of load, self-learning, with incremental encoder, voltage test possible without removal, short-circuit proof and overload proof (electronic fuse), with screw terminals. Note: Do not connect inductive and capacitive loads together.