1. 36V, 9ah, 220-250W 2. brushless DC motor 3. complete aluminum alloy frame 4. PAS(Pedalling assistant system) ... ride: signal lamp, bell, disc brake D. Key-locked lithium battery E. Aluminum alloy frame, DURABLE F. 40 Miles charging capacity ... 4. NW/GW:19.5/22.5KGS 5. Warranty: battary, motor 2 years frame, charger 1 year5. folding mini e bike ...