[large capacity battery]: 13an battery supports max speed: 30-35km/h, is equipped with a smart lithium battery charger for fast charging (4-6hrs), endurance mileage up to 45-50km. [3 working modes]: ebike & assisted bicycle & normal bike. with the 3.5inch lcd 5-speed smart meter button, you can choose the electric assist level according to your needs. [upgrade configuration]:shimanotx50, 6061aluminum alloy frame, ,hydraulic 160 double-disc mechanical disc brakes at the front and rear, ipx5 waterproof performance, heavy-duty horns, and lights. [kenda tire]: multi-terrain application, such as marble pavement, cement road, carpet, blind track, etc. durable in all condition road--more than safe, balanced, fast, and stable for your cycling. [good riding experience]& equipped with multi-functional lcd display,adjustable seat, high brightness front light, anti-skidding tire, increase stability, comfort, and energic riding experience..syi