20" Aluminum front and iron back ;Aluminum alloy suspension fork;shimano 7-speed;Mechanicaldise brake;KENDA F24“R20“*4.0 Tire;Battly  21700 cell/MADE IN CHINA 15AH;charge time7-8H;48V750W hub-motor;Mileage≥65km;Max speed ≤25km；Speed sensor;LCD display;led light;IP65，L1920*W800*H1200;