The LED dimmer is mount, mounting hole size is 10mm/0.39 inch, it saves space and can be attached to the LED light. This LED light dimmer switch is usually used as a DC12V switch and can also be used as a 3.6V to 15V LED touch switch. make your driver is a constant voltage driver as this dimmer switch can only be connected to a constant voltage driver. This LED dimmer switch cannot be connected to a constant current driver. You can check the picture to understand the difference between constant voltage driver and constant current driver. 12V DC LED dimmer: DC switch Input voltage: DC 3.6-15V; working current 2.5A, 12V dimmer switch intelligent control, just touch, touch again, press and hold the dimmer switch to adjust the light brightness from 0% To 100%, long press the touch light control module to steplessly and control the light. 12V volt switch for , cabinets, wine coolers, display cases, closets and more. The 12 volt light switch is also used to control LED lights like desk , ceiling lights, pendant lights and other smart devices, you can run the LED switch on other items. size: 10mm Material: ABS colour: White Package Contents: 2 x Led Touch Switch Only the above package content, other products are not included. Note: Light 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.