HOVERZON S Series Self Balance Hoverboard Scooter UL 2272; Dual Power 250-Watt Motor; Durable Aegis Armor Battery 250 watt dual motors - speed up to 8 mph with a range of 11 miles and supports up to 220lbs UL 2272 Certified - the HOVERZON 2-wheel self-balancing scooter excelled in all electrical safety tests SELF BALANCING - dynamic equilibrium is maintained by using two gyroscopic motors, which allow you to control the hoverboard by shifting your body weight Fully loaded - equipped with LED headlights, battery indicators, rubber bumpers, and two riding modes RIDE SAFE - with Patented Hoverzon Aegis Armor smart battery management system provides multi layered hover skate-board protection.Kindly refer the below PDF for measuring guide