w w w dot lehechina dot com george at lehe-china dot com LEHE S1(normal version) features: 1.Aviation aluminum integrated frame 2.LED multiple function meter 3.Front & rear disc brake 4.Speed sensor system 5.Spoked hub 6.LG lithium battery 4.4AH LEHE S1 (super version) features: 1.Aviation aluminum integrated frame 2.LED multiple function meter 3.Front & rear brand disc brake 4.Torque sensor system 5.Magnesium alloy integrated hub 6.LG lithium battery 5.8AH 7.Front "ZOOM" suspension fork 8.Bluetooth speaker Specifications & Parameters: Nominal voltage: 36v rated power: 250w battery capacity: 4.4AH / 5.8AH endurance mileage: 40-50km / 50-60km net weight: 16.5kgs charging time: 2.5 5 hours motor type: brushless gear motor motor rated torque: 10 N.M material type: Aluminium 6061-T6 loading weight: 120 kgs battery type: LG 18650 Lithium water proof grade: IP X4 charger: 110-240v: 50-60 Hz hub: spoked hub/ magnesium alloy incorporate hub tyre size: 20â?� overcurrent protection: 15A unfold size:1590*1015*595mm controller undervoltage protection: 31.5v package size:1400*230*850mm