Diamond Group Rotary Dimmer Control Black. It rotates to dim lights and is designed for extreme temperature variations. The rotary dimmer control is protected from voltage spikes and works with all kinds of lighting including: LED 15A at 12V DC UL CSA and VDE. Features of Diamond Group Rotary Dimmer Control Solid state dimmer assembly Clicks on/off and rotates to dim Designed for extreme temperature variations and protected from voltage spikes Works with all types of lighting including LED 15A at 12V DC UL CSA and VDE Dimensions: 2.22" x 3.52" Package Contents: Diamond Group Rotary Dimmer Control Diamond Group DG52484VP: Rotary Dimmer Control Black