Replaces a standard switch. Provides smooth, full range digital dimming for Incandescent, Halogen, Electronic Low-Voltage, Magnetic Low-Voltage, dimmable LED/CFL, and Fluorescent lighting. 300w dimmable LED/CFL- 600w incan/dimmable ELV/halogen/dimmable FLR 600va MLV - 120v/Ac, 60 Hz requires neutral connection in wallbox. Ability to set min/max dimmer level for maximum compatibility with different loads. Rapid start feature which allows the light to come on instantly in thecase of LED/CFL loads and the ability to disable that feature. One master dimmer works with up to five (5) accessory dimmers, Orgill SKU 339-6181. Tri-color packaging which provides one unit box with three color faceplates. cULus Listed and NOM Certified.