... devices. Small size, light weight and portable.Datasheet: Product NameMobile power bankColorBlue, green, cherry color, pink, silver,whiteProduct modelPower BankShell ... 4 lights ,75%---100%External power supplieslong press the power button for 3-5 seconds, after four LED lights bright flash three times ... steel bottom shell.3 ultrathin 7.5MM, standard USB output. power bank for tablet pc with LED light