First of all, install PLAYBULB rainbow to your light fixture (Standard E26/ E27 screw base).
You can also use adaptor to convert and fit into E40, E14 and B22 screw sockets.
Second, turn on the light by light switch.
Third, start PLAYBULB X App.
Go to DEVICE.
Tap CONNECT.
Your PLAYBULB rainbow is now connected.