Input Voltage: 12V - 24V (12-24V) DC Output: 1 Channel (each controller for 1 strip/ribbon/lights for up to 8amp at 12vdc) Controller Dimension: L89 x W59 x H35 (H57 with Knob switch) Each order is for 1 controller Revision 2 for 24V DC compatible Ribbon, Strip, 12 - 24 Volt (12V - 24V) 8 Amp, Electrical Dimmer Switches for Home, Commercial, Industrial, and Office. Dimmer is compatible with Hilight, LED wholesaler, fillite, and others' strips Dimmer is compatible with Hilight, LED wholesaler, fillite, and others' strips PWM dimmer is built for low voltage lights and strip, you get soft, stable dimming effects with no flickering with your lights & ribbon. Color: Beige material: plastic package: 20 x Controller Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.