Rated voltage (DCV): 48V. Pedal sensor: Torque Sensor Is Integrated Into The Motor. Bottom Bracket Length: 68-73mm. Bottom Bracket Diameter: 34-36mm. Noise level (dB):? 55. 1 PC Mid-Drive Motor (Optional) 1 PAIR Brake Levers or Brake Sensor 1 PC Thumb Throttle 1 PC Display (Optional) 1 PC Power Connection Cable 1 PC Installation Tools 1 Pairs Crank-Arm 1 PC Speed Detective Sensor. Torque Sensor Technology : Both models feature advanced torque sensor technology that automatically adjusts power assistance based on your pedaling force, providing a natural and responsive ride feel. Quiet Operation : Experience a smooth and quiet ride, thanks to the innovative design that minimizes noise, so you can enjoy the beauty of your surroundings. User-Friendly Installation: Widely compatible with BB 68-73mm bottom bracket, easy to install on most bike frames, making it a hassle-free upgrade for your e-bike setup. Fits 95% of standard bike frames with 68-73mm bottom bracket and 34-36mm inside diameter. 30% lighter than a Bafang motor for almost the same power output. Built in torque and cadence sensor – this results in much smoother acceleration than any cadence sensored mid motor. Kit includes all installation hardware and tools. The motor has an extra support mount – resulting in a much more reliable install than a Bafang BBS motor. 80Nm of torque is almost twice as much as a hub motor and can help you climb up any hill in your way.