The Wattstopper WS4FBL3PW is a Wide Slide 0-10V Fluorescent/LED Slide Dimmer rated for single pole and 3-way applications in commercial offices, retail, and institutional environments. Compatible with 0-10V, 4-wire dimming ballasts and LED drivers at 120V and 277V, it features preset functionality for consistent scene recall. Available in White finish for standard decorator-style wallplates.