... 120W &150W are available. 2,batter:4.5AH,7AH &10AH are available. 1,electric scooter moter:100W,120W &150W are available ... . 2,batter:4.5AH,7AH &10AH are available. ... 3,braking: rear hub brake by hand.4,dimension of the tyre: 6 &8 inch are available ... .11,drive system: synchronous belt or chain. electric scooter