?Foldable Design?: VIVI folding electric mountain bike, the frame made of ultra-light aluminium alloy, can be folded quickly in one step. The folded size allows you to put it in the trunk of your car or under a single bed, making it easy to carry and ready to start riding trips. The seat and handlebars are adjustable to suit people of different heights. ?ELECTRIC SYSTEM?: Equipped with the 36V 8AH lithium-Ion front battery and 350W stable motor, you can reach a range of up to 50 miles at toppest speed 22mph per charge. The removable battery design is convenient for you to charge and enhance the user experience. ?3 Working Modes??Electric Mode& Assisted Mode& Normal Mode.Change the mode with the LED 3-speed smart meter button, It promises a range of 44-50 miles when riding in Assisted Mode or 22-25 miles using throttle . You can add a burst of speed with the throttle.Combining three modes would be a better choice. ?Shimano 21-Speed Gears??Front wheel 3-speed and rear wheel 7-speed gives the Vivi folding e-bike a professional 21-speed function.Increases stronger hill-climbing power, further range variation, and greater terrain adaptability than 6/7 speed gears. It is also equipped with double fork shock to allow you to ride smoothly on hills and uneven roads.It combines the performance of a mountain bike and a city bike into one. ?After-sales service?? One year Repair on Battery, Motor, Controller, Charger, Dashboard, and Frame.Six-month Repair on Brake, Handlebar, Seat, Pedals, Tires, Headlight, and Booster.Choose Vivi Folding Electric Mountain Bike for More Energy, Faster Speed, Stronger Materials, and a Guaranteed After-Sales Service!