Please remove the protective cover before use it. We just supply you with a USB cable, you can be powered with the universal phone adapter, power bank or computer USB interface. The package only includes the light board and USB cable.
If the light is flicking after powered on, it is a normal situation that may be caused by the input that doesn't match the product. You can solve the problem by replacing the charger, charging treasure or computer interface.
The memory function doesn't work if the power supply is off.