If you dont know how to connect this dimmer to a light here is the wiring instruction https forum banggood com forum topic 326855 htmlSpecification Material plasticColor blackAC 220V 50HzMAX power 150W3 levels low medium high then offSize 4 5 x 3 5 x 1 5cm L x W x H Cable length about 9cmFeature CE approvalNote connect the wire correctThe power of lamp can not exceed 60WThe yellow line must connect with conductor such as metal can not connect with plastic or woodAfter install the touch device dimming or open lamp can not allowed on power cordNote Fit for ordinary light bulbs not suitable for LED bulb or energy saving lampsPackage included 20 x 3 way touch sensor switch