PREMIUM QUALITY: The e-bike adopts 100 percent aluminum alloy frame, the front fork is made of high-strength carbon steel and packed with premium comfort shock absorption; Meter has 3-speed smart meter button and double layer aluminum alloy wheel. br BRAKE & GEAR SHIFT SYSTEM: With front and rear disc brakes and 21-speed transmission system, you can choose any speed to complete your journey, and perfect brakes fully protect your safety. And the bright LED headlamp and horn is equipped for night riding br LITHIUM BATTERY: The removable 36V, 8AH Ion lithium battery, equipped with smart lithium battery charger can make you ride up to 25-50 kms.