Features: 1.36V250W brushless toothed motor specifications, strong and powerful. Equipped with a powerful controller to ensure large current supply. Suitable for V-brake and disc brake. The maximum speed of the motor is 30km / h. The size of the rear fork is 135mm. With ordinary thumb type handle 7. The size of the rim is 2 inches (suitable for 28-inch/700C bicycles). Crank speed sensor for pedal assist. LCD function: speed mileage display, power display, fault display, speed five speed, fixed speed cruise packing list: 1 Motor 1 Controller 1 Auxiliary 1 Electronic power brake 1 Thumb Throttle 1 LCD display 1 Waterproof cable 1 Controller portable bag 1 7 speed flywheel (equipped with rear wheel).