This product is made of high quality ABS material, which is durable and not easy to wear. Hall sensor has the advantages of small size, light weight, shockproof, anti-corrosion, dustproof, etc. It is suitable for use in electric bicycles. Precision machining, precision assembly, quality. This auxiliary sensor is suitable for pedal-assisted electric bicycle drive system, saving time and effort. Applicable to all electric bicycles on the market, it is a good helper for electric bicycles. Condition: Magnets: 12 Line color definition: 1. Red 5V 2. Green power signal 3. Black GND Installation and use: The middle shaft card slot rotates following the middle shaft, and the outer casing sensor is fixed. There is no need to disassemble the middle shaft, as long as the inner ring is caught in the middle shaft and the outer casing is fixed to the , it is convenient to install, stable and . Right side installation: Step on the output signal and reverse to not output. Left side installation: output signal, reverse step will not output. Colour:black Material: ABS Size:Length: 100cm Package Contents: 1 x Bike Pedal Assist Sensor Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.