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 Wheel: 29*2.1 inch Wheel Load: Shimano 21 Speed Gear Max Speed: 50km/h Max Grade: 45 Degree Waterproof: IP54 Absorber: Front Shock Absorption Battery Capacity: 48V 15Ah*2 Charging Time: 4-5h Control system: 48V 9 Tubes Endurance: 50KM Motor: 48V 750W Brake: Disc Brake Product Weight: 26kg Package Weight: 28kg Product Size: 184 x 113 x 70 cm Package Size: 142 x 23 x 77 cm Package Contents 1 x C29 Electric Moped Bicycle 2 x Batteries 1 x Charger 1 x Tool 1 x Pump