Smart Balance Electric Scooter,Mobility Scooter, Electric Chariot,Our scooter can make a turn by zero degree. •Automatic Balance System Two Wheels Scooter •Specification: •1) Motor ... System: Balance system •7)Tyre Size: 21/7-10' off-road tire •8)Max Speed: 15km/h, with reverse gear • ... electricity expense of 0.06 ST-002-DP,Smart Balance Electric Scooter,Mobility Scooter, Electric Chariot (CE approved)