The LED dimmer is recessed, its hole size is 10mm/0.39in, it saves space and can be easily attached to the LED light. The LED light dimmer is usually used as a DC12V switch and can also be used as a 3.6V to 15V LED push switch. Please ensure your driver is a constant voltage driver as the dimmer can only be connected to a constant voltage driver. The LED dimmer cannot be connected to a constant current driver. You can check to understand the difference between constant voltage driver and constant current driver. DC 12V LED Dimmer: DC switch input voltage: DC 3.6-15V; 2.5A operation, 12V dimmer intelligent control, just press, press, press and hold the dimmer to adjust the brightness from 0% to 100%, long press the dimmer control module Press the light to continuously dim and control the light. 12V switch for RVs, cabinets, wine coolers, display cases, closets, and more. The 12-volt light switch is also used to control LED lights such as desk lamps, ceiling lights, pendant lights, and other smart devices, you can use the LED switch on other items. Size: 10mm Material: ABS Color: White Package Contents: 2 x LED push switch 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.