Features: 3.Size: 70.5x33.5x34mm or 2.78inchx1.32inchx1.34inch (LxWxH) Color: Black.4.Wattage: 100W Applicable load power: 15-75W.5.Applicable to all kinds of lamps, electrical appliances, transformers, etc. with power cord control, scope of application: resistive heating wire carbon brush motors and fans above 20W tungsten filament lamps.6.Assembly method: Welding.Note: Prohibited for use in LED lamps and energy-saving lamps.Installation method (wiring steps):1. The 2 ends of the brown wire are welded to the 2 round holes of the dimmer switch core respectively.Wiring points: Do not expose too much copper wire, otherwise it will be easy to short circuit, causing the switch to be short-circuited and burned.2. After welding, the wires pass through the side of the dimmer switch core.Wiring points: The wire must not pass over the dimmer switch core, otherwise the adjustment switch will be short-circuited if the wire is broken, causing the adjustment switch to burn out.3. Close the back cover and tighten 2 screws. Finally, the gear knob can be pressed up. Once assembled, it is ready to use.Specifications:Material: PlasticColor: BlackBrand name: BQLZRSize: 70.5x33.5x34mm or 2.78inchx1.32inchx1.34inch (LxWxH)Weight: 125gPackage include:5 x Rotary Cord Switch AC220V Black Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.