Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Connect it between the driver and the light and adjust the brighness with the manual knob.4.Control the brightness of lights lighting.5.Suitable for all kinds of lamps, electrical appliances, transformers, etc. that carry power control lines. 6.This product requires simple soldering by the buyer before it can be used normally. Soldering Instructions:1. The ends of the two copper wires to be welded must be wiped with solder paste or rosin.2. This Dimmer Switch adopts triac, so there is no fixed soldering direction. It can be soldered from that end or another end, and there is no distinction of zero line and fire line.Note: this is only fit for 15-75W load.Specifications:Material:PlasticColor:BlackVoltage:220VPower:100WAssembly method: welded typeSize:7x3.3x3.4cm/2.76x1.3x1.34Inch(LxWxT)Weight:25gPackage include:1 x Manual Dimmer Switch