If the LED lights do not work properly, please check the following: 1. Please check the direction of the connection and try in the opposite direction, according to the following picture. 2. Please check the remote control. You need to tear off the plastic septum before you can use it. 3. Do not hold the remote control too far away from the receiver and make sure there are no obstacles between them. 4. Please note that the remote control does not contain batteries for transport safety; the battery model is: CR2025 5. LED has 16 colours to choose from, it is USB interface, no plug USB Powered -- Comes with a 5V 2A powered USB cable (USB plug not included) that can be plugged into your TV, computer and power bank, etc. Safe and easy to use indoors. Specification.