This product is made of high-quality ABS material, which is durable and does not wear out easily. The Hall sensor has the advantages of small size, light weight, shock resistance, corrosion protection, dustproof, etc. It is suitable for use in electric bicycles. Precision machining, precision assembly, excellent quality. This assist sensor is suitable for pedal-assisted electric bicycle drive systems, saving time and effort. Applicable to almost all electric bicycles on the market, it is a good helper for electric bicycles. Condition: Magnets: 12Line color definition:1. Red 5V2. Green power signal3. Black GNDInstallation and use:The bottom bracket slot rotates with the bottom bracket, and the outer casing sensor is fixed.There is no need to disassemble the bottom bracket, as long as the inner ring is caught in the bottom bracket and the outer casing is fixed to the frame, it is convenient to install, stable and reliable.Right side mounting: Pedal on the output pulse signal and reverse to not output.Left side mounting: output pulse signal, reverse step will not output.Color: blackMaterial: ABSSize: Length: 100cmPackage contents:1 x Bicycle Pedal Assist SensorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.