Usage Tips: This product is made of material that is durable and not easy to wear. Hall sensor has the advantages of small size, light weight, shockproof, dustproof, etc. It is suitable for use in electric bicycles. Precision machining, assembly, excellent quality. This auxiliary sensor is suitable for pedal-assisted electric bicycle drive system, saving time and effort. Applicable to almost all electric bicycles on the market, it is a helpful accessory for electric bicycles. Specifications: Condition: New Magnets: 12 Line length: 1m / 3.3ft Line color definition: 1. Red – 5V 2. Green – Power signal 3. Black – GND Installation and use: The middle shaft card slot rotates with the middle shaft, and the outer casing sensor is fixed. There is no need to disassemble the middle shaft; simply install the inner ring onto the middle shaft and fix the outer casing to the frame. Installation is convenient, stable, and reliable. Right side installation: Outputs pulse signal when rotating forward; no output when reversed. Left side installation: Outputs pulse signal when rotating forward; no output when reversed. Color: Black Material: Plastic Package Contents: 1 x Sensor Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allows an error of +/- 1-3cm.