About Powering: Use the built-in power switch, turn on the light with the ON key, then press the ON key sequentially to cycle through the light colors. About Charging: Charging is by USB, and each shoe should be charged approx. 3 hours; total battery life is around 9-10 hours. About Washing: Please do not wash the shoes with water, you can use colorless shoe polish for cleaning. About Color Conversion: Seven Color, Three modes--Red,Green,Blue,Yellow,Light Blue,Purple,White;Flash White;Colorful.