1 Size L Large frame 20 inch. 3Battery Manufacture 48V-54.8V 20AH BMS 65A special for this power. Samsung cells Brand Electric Power RC. 4Button acceleration Switch 250W-3000W. 5Rear wheel on display you can see on full power 2600W-3000W Mtx39 Brand RC Power. 6Max speed 45+Mph on flat road on little bit angle 50+Mph, 15-25 seconds 40+Mph very fast. 7Pedal assistant 5 modes. 83 amp Fast charger with cooler. 10Brake sensor (? For a long life motor MTX39 RC Power?). 11Hydraulic brakes with sensors. 13Light Rear, Front. The bike has 5 modes of pedal assist and a thumb throttle top Speed 45+ mph It has a button when you press 1 them did bike to 250 watt 15.5mph which makes it speed legal with pedal assistant.