Includes everything needed (except tires and battery) to convert your standard bike into a top-of-the-line performance electric bike, which delivers unequaled performance and reliability. You'll be out cruising along at. Built to the highest international standards, CE, EN15194.48V 1500W and 750W super power brushless gearless hub motor. Comes with 26'' Rear Wheel. Restricted to 750W and 24 mph by default as a road-legal kit. Alloy rim& galvanized steel spoke The whole wheel without tire! Rare-earth metal magnet are used in the motor to efficiently produce large power. Aluminum alloy powerful controller guarantee big current supply. Twist throttle has battery level display and power-cut off button. Brake Levers cut off the power supply to the motor safely. Crank speed sensor for pedal assist. Allow you to swap two power modes between the full 1500W power or 750W power by a single blue switch wire is embedded in controller. Still remain the full 1500W power with no speed control. (Only for Pedal Assist System, "PAS"). The system requires a 48 Volt electrokinetic cell battery with a nominal capacity not less than 14.5Ah. Battery and charger are not included in package. The US regulations dictate that a kit must not exceed the rated power of 750W to be road-legal! So please connecting the Road-legal Switch Wire and disconnect the PAS on Road. For your Safety, Please turn off the battery before connecting the Controller! Power: 1500W / 48V or 750W / 48V. Max speed: 34 mph or 24 mph. Wheel Size: 26(For 26 inch tires). 1x Brushless Gearless Motor Rear Wheel(without tire). 1x Pedal Assist Crank Sensor. 1x Cable Ties & Plastic Coil. 1x Pair of Handle Bars (included Twist Throttle). 1x Pair of Brake Handles.