Universal-dimmer 120 V~ 60 Hz, phase-cutting, for: 40-400 W incandescent lamps, 40-300 VA electronic transfomers, 10-200 W CFL lamps, 3-200 W LED lamps, LED phase-cutting electronic transfomers, ON/OFF control and built-in or from NO peripheral push buttons regulation, MASTER function for 19137.120, minimum brightness regulation, visible in darkness, Metal. Not for Isoset enclosures