Universal touch dimmer 1-way (R, L, C, LED), round support ring. Touch dimmer (R, L), electronic platform 2012, low energy consumption, switch-on brightness can be saved in the event of a power failure, soft start-up that protects the lamp, phase control, short-circuit proof and overload proof (electronic fuse), with extension input for button (normally open) with single-surface operation and motion detector extension, also suitable for attaching suitable KNX radio attachments, can be expanded using universal power add-ons Plus REG, no conductive connection between support ring and spreading claws, with screw terminals.