The motor kits do not include a battery. Eco-friendly and high-performance, the Bafang Mid Motor Kit is designed for electric bikes, featuring a Bafang Mid Drive Motor with a nominal voltage of 48V and a rated power of 500W. Position: Mid Motor Construction: Geared Motor Nominal Voltage: 48V Rated Power: 500W RPM: 126±7 Max Torque: 100 N. M Efficiency: 85% PAS SENSOR: Speed sensor Shaft Standard: JIS Mounting Parameters: Weight: 4.3 kg Functionality: E-Brake: Yes Gearsensor Function: Yes Light Drive Capacity (DCV/W): 6/3 (max). Cadence (Pulses/Cycle): N/A Reduction Ratio: 1:21.9 Magnet Poles: 8 Noise. IP-Code: IP 65 Certifications: CE / UL / ROHS EN 14764. 1 Headlight 1 Wrench 1 36V250W sticker 1 Crank Puller 1 Bottom Bracket Remover 1 User Manual Note: The motor is designed to fit bottom brackets with a width of. And an inner diameter of. Please note that the motor kit does not include screws for 73mm bottom bracket. Choosing Brake Levers or Sensors. We send the brake levers default. The kit is compatible with or without brake sensors. For standard cable actuated brakes, select brake levers. For adapting existing brakes, especially hydraulic ones, magnet sensors are available. Additional costs may apply for remote area deliveries. Local return addresses will be provided for convenience. Your satisfaction is our priority. We appreciate your 5-star feedback and are here to assist you with any issues.