1. This product is made of high-quality ABS material, which is durable and not easy to wear. 2. The Hall sensor has the advantages of small size, light weight, shock resistance, corrosion resistance, dust prevention, etc., and is suitable for electric bicycles. 3. Precision processing and precision assembly ensure the quality. 4. This auxiliary sensor is suitable for the pedal - assisted electric bicycle drive system, saving time and effort. 5. It is suitable for all electric bicycles on the market and is a good helper for electric bicycles. 6. Product status: - Number of magnets: 12 7. Definition of wire colors: - Red: 5V - Green: Power signal - Black: Ground 8. 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 is convenient and stable. - Right - side installation: Pedaling outputs a pulse signal, and reversing does not output. - Left - side installation: It outputs a pulse signal, and reverse pedaling does not output. 9. Color: Black 10. Material: ABS 11. Dimensions: Length 100 cm 12. Package contents: - 1 bicycle power - assist pedal sensor Only the above package contents are included, and no other products are included. 13. 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.