On Off Switch, GLISTENY Strip Light Inline Light Dimmer Touch Control Dim Switch Touching Type Switch With Terminal For Led Light Strip Led Rigid bar Led Tape Light Sizeswitch diameter 23mm. The clearance hole diameter should be slightly larger than 0.75" or 3/4". WorkPower on, the blue indicator light.Short press, the sensor control LED lights on and off. Long press, sensor control LED brightness gradually dimming. Operating voltage5-24V DC (No power supply)Make sure that you are connected to a working voltage of 5-24V. UseConnect the power supply inductor and the LED lamp according to the diagram.It is strictly forbidden to use ultra-power range, otherwise it will damage the sensor. NoteThe main part of the touch switch is a high-grade plastic material. Metal will be conductive, not suitable for touch switch materials.Do not touch the metal below the switch (hexagonal metal) and it will conduct electricity. It is only used to fix the switch inside the hole in the accessories.