Timing function. can be timed to turn off the lights after 2 hours, 4 hours, and 8 hours. Suitable LED lamp, incandescent bulbs, halogen lamps, table lamps, and other bulbs. Button switch dimming function, full brightness adjustment range dimming. 4 Key button control, safe to use and easy to operate. Plastic shell, smooth without burrs, serviceable. Input Voltage: 110-120V Dimming Range: LED Max.25W; Incandescent Lamp Max.100W; Halogen Lamp Max.100W Installation Methods and Steps: 1. First, install the button shim into the front housing. Please pay attention to the correct direction. 2. Remove the protective film from the back contacts of the circuit board, and then install it above the button shim. Please pay attention to the correct direction. 3. Connect the load line. Solder the load wiring to the "Load" end of the circuit board. 4. Connect the power cord. Weld the positive and negative terminals of the power supply wiring correctly to the circuit board "L" and "N" ("L" is the live line, "N" is the zero line) 5. Close the plastic back cover and complete the installation. Please pay attention to whether the wire diameter of the incoming and outgoing wires is appropriate. Note: Please don't connect electricity until all installation steps are completed. Please confirm if your light bulb is dimmable, and the power is within the appropriate range. Product Name: Electronic Timed Dimmer Switch Colour:Black Material:plastic Package Contents: 1 x Timed Dimmer Switch Only the above package content, other products are not included. Note: Light reflection 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.