This product is made of high-quality ABS material, which is durable and resistant to wear. The hall sensor offers advantages such as compact size, lightweight, shock resistance, corrosion resistance, and dust protection, making it suitable for use in electric bicycles. Precision machining and assembly ensure excellent quality. This auxiliary sensor is designed for pedal-assist electric bicycle drive systems, helping to save time and effort. Compatible with most electric bicycles on the market, it serves as a reliable helper for e-bike performance.Condition: New Magnets: 12 Line color definition: 1. Red 5V 2. Green Signal 3. Black GND Installation and use: The middle shaft card slot rotates with the crankset, while the outer sensor casing remains fixed. No need to disassemble the bottom bracket; simply install the inner ring onto the spindle and secure the outer casing to the frame for a stable and reliable setup. Right-side installation: Pedaling forward generates output pulse signal; reverse pedaling does not output. Left-side installation: Forward pedaling generates output pulse signal; reverse pedaling does not output. Color: Black Material: ABS Size: Length: 100 cm Package Contents: 1 x Bike Pedal Assist Sensor Note: Light and display settings may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.