Electric bicycle

Size: 185x71x112cm battery specification: 12V20Ahx4 rated voltage:48V battery type:maintainable sealed lead-acid battery motor power:800W motor type:48V motor brushless rated load:75kg max speed:40km/h range per charge:40km charging time:6~8h climbing ability: 13? Basic configuration:300-10 wheels, rocker front fork, front & back drum brakes , w/bumper