E-bike System Assist Sensor Labor Saving High Accuracy Power Assist Sensor For Electric Bicycle Features: Featuring simple installation and disassembly, it is more convenient to use.The function of this pedal assist sensor is to help extend cycling mileage with good accuracy. Extend battery life and improve vehicle cruising range. Avoid damage to the battery due to high current discharge This product is perfectly suitable for bike, electric bicycle, etc. According to the speed of the turn of the foot to identify the power, pedal up in the process of riding is more lightweight and electricity saving. Specification Size:Diameter of outer ring 6.5cm, diameter of inner ring 1.5cm Package Include:1Pcs * E-bike Assist Sensor Note: Due to different personal measurement methods, there will be an error of 2-4 cm, please understand Thanks for your support Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-17111 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it