Safety and Comfortable Commuting S2 MAX electric scooter features a front-wheel mechanical drum brake and a rear regenerative e-brake to enhance safety. Hiboy s2 max electric scooter adult 500w long range 10 tires safe kick scooter intelligent braking regenerative battery system with 50 pcs high-capacity (48v, 11.6ah) cells, max travel range of 40.4 miles per charge.