Aluminum Alloy Frame It has higher strength, corrosion resistance, and rust resistance, and ensures the support strength of each part. Strong 750W Power The 48V 750W high-speed brushless gear motor provides enough power to reach up to 50km/h. Shimano 21-speed Gear Shimano 21-speed gear increases stronger hill-climbing power further range variation, and greater terrain adaptability. 18650 Lithium Battery The removable 15Ah battery can be charged on or off the frame; the BMS system protects the battery, increasing service life. 3 Modes of Travel Built-in 3 riding modes: ride mode, assist mode, and pure electric mode; easily switch according to the gear and mode, and can calmly deal with the needs of different scenes. Specification : Brand: DUOTTS Type: Electric Bike Model: C29 Color: Black Material: Aluminum Alloy Tire: 29*2.1 inch inflatable tires Load: Shimano 21 Speed Gear Max Speed: 45-50km/h Max Grade: 45 Degree Waterproof: IPX5 Absorber: Front Shock Absorption Battery Capacity: 48V 15Ah (East Magnetic 21700) Size of C29 battery: 36.5*9*11cm, Net weight: approx 3.95kg Range： pure electronic mode 50-60km, pedal-assisted mode 80-100km（Depending on road conditions, speed and drivers' weight） Charger：54.6V 2A (Input: 110V-240V) Charging Time: 6-8h Controller：Sine Wave Controller （48V 20A Jing Hui controller) Motor: 48V 750W Brake: Front and rear disc brakes 160mm diameter Diaplay：5-speed multifunction display Riding modes: 1. Pure electronic mode, 2. Pedal assisted mode, 3. Riding mode Rear Rack Load: 60kg Fenders： front and rear fenders Maximum Load: 120kg Suitable height：170-200cm Max climbing angle: 30° Suspension: all-aluminum shock-proof front fork with 100mm Fenders： front and rear fenders Net weight: 26.5kg Gross weight: 31.7kg Product Size: 184 x 113 x 71.5 cm The length of handlebar: 71cm Saddle height: saddle distance from the ground 89-100cm Package Size: 146 x 24 x 79 cm Package Contents 1 x C29 Electric Bike 1 x Charger 1 x Battery 1 x Tool 1 x Pump 1 x Rear Rack