Up to to 21Ah (1008 watt-hours) Samsung Cells Lithium Removable Battery 48V 750W Geared Hub Motor Thumb Throttle Beautiful Display w/ 7 level Electronic Pedal Assist System USB Phone Charging Port on Handlebars IP67 Water & Dust-proof Electronics & Connectors AC 120V 2A ChargerUse Pedal Assist and/or Throttle