Model No.: FS006 Wheel size: 20" Folding: Yes Climbing capacity: 12 degrees Rated load: 75kg Max speed: 22kph Successive driving distance: 85km Battery capacity: 9AH (Ni-MH, nickel-hydrogen) Battery voltage: 36V Motor: 160W, brushless, small efficiently Charge time: 4-6 hours Weight: 20-22kg Derailleur: SHIMANO 6-speed Working style: grip accelerator and pedal assisted Frame material: steel or aluminum alloy Carton dimensions: 136 x 87 x 25cm 20Q: 118pcs 40Q: 245pcs 40HQ: 309pcs