A. This product is made of ABS material, which is durable and not easy to wear. B. The Hall sensor has advantages such as small size, light weight, shock resistance, corrosion resistance, and dust prevention, and is suitable for electric bicycles. C. Precision processing and precision assembly help ensure the quality. D. This auxiliary sensor is suitable for the pedal - assisted electric bicycle drive system, saving time and effort. E. It is suitable for many electric bicycles on the market and can be a useful helper for electric bicycles. F. Product status: - Number of magnets: 12 G. Definition of wire colors: - Red: 5V - Green: Power signal - Black: Ground H. Installation and use: - The bottom bracket slot rotates with the bottom bracket, and the housing sensor is fixed. - There is no need to disassemble the bottom bracket. Just attach the inner ring to the bottom bracket and secure the housing. The installation can be convenient and stable. - Right - side installation: Pedaling may output a pulse signal, and reversing may not output. - Left - side installation: It may output a pulse signal, and reverse pedaling may not output. I. Color: Black J. Material: ABS K. Dimensions: Length 100 cm L. Package contents: - 1 bicycle power - assist pedal sensor Only the above package contents are included, and no other products are included. M. Notes: Light and different monitors may cause slight differences between the color of the item and the actual object. The allowable measurement error is +/- 1 - 3 cm.