If you don't know how to connect this dimmer to a light, here is the wiring instruction: https://forum.banggood.com/forum-topic-326855.html
Specification:
Material: plastic
Color: black
AC: 220V 50Hz
MAX power: 150W
3 levels: low, medium, high, then off
Size: 4.5 x 3.5 x 1.5cm ( L x W x H )
Cable length: about 9cm
Feature:
CE approval
Note: connect the wire correct
The power of lamp can not exceed 60W
The yellow line must connect with conductor, such as metal, can not connect with plastic or wood
After install the touch device, dimming or open lamp can not allowed on power cord
Note:
Fit for ordinary light bulbs, not suitable for LED bulb or energy saving lamps
Package included:
20 x 3-way touch sensor switch