Color: White / Black (optional) Material: Aircraft-grade aluminum alloy Wheel Size: 8.5 inch inflatable tire Motor Size: 6.7 inch Maximum Speed: 25km/h (common mode); 18km/h (energy-saving mode) Cruising Distance: 30km Rated Motor Power: 250W/350W Maximum Motor Power: 500W Max Load: 100kg / 220lbs Maximum Torque: 16N.m Braking System: Front E-ABS anti-lock system; Rear: Mechanical disk brake Battery :4.4Ah /7.8Ah Climbing Gradient: Approx 14 degree Water Resistance: IP54 Pedal Ground Clearance: 87.5mm Charger Rated Power: 71W Charger Input Voltage: 100 - 240V, 50/60Hz Battery Limited Voltage: 42V Charging Time: Approx. 5 hours Standard Power Consumption: 1.1kWh per 100km Unfolded Size: 108 * 43 * 114cm / 42.5 * 16.9 * 44.9in Folded Size: 108 * 43 * 49cm / 42.5 * 16.9 * 19.3in Net Weight: 12.5kg / 27.6lb For more information, please contact our company(xinex tech). Thank you.