Self-calibration feature allows to select lamp type, which then automatically sets the minimum voltage for that lamp, eliminating flicker and poor performance. Works with virtually any dimmable lamp and load on typical residential and light commercial wiring (with the exception of 0-10V LED drivers). Convenient operation combines ON/OFF paddle switch with separate slider for dimming control. Wider slide controller for easier dimming operation. Preset, single pole and 3-way operation. Constant memory returns lights to previous level after a power failure. White LED glows when dimmer is OFF for easy location in the dark. Rating: Incandescent, Halogen ELV: 700W, MLV: 50VA, LED/CFL: 450W (not compatible with 0-10V LED drivers), EFL: 5.5A Comes with three interchangeable face colors: Ivory, White, Light Almond; six additional face cover colors available but sold separately.