Brand New with high quality Material: ABS Magnets: 12 Line length: approx. 1m / 3.3ft Line color definition:1. Red 5V.2. Green power signal.3. Black GND Size:5.4*4.4cm Quantity:1pc Features: 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. Good machining, Well 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 good helper for electric bicycles. 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 frame, it is convenient to install, stable and reliable. Right side installation: Step on the output pulse signal and reverse the step to not output. Left side installation: step forward output pulse signal, reverse step will not output. Package Include: 1pc Bike Pedal Assist Sensor Notice: 1.1cm=10mm=0.39inch. 2.Please allow 1-2mm error due to manual measurement and make sure you do not mind before ordering. 3.Please understand that colors may exist chromatic aberration as the different placement of pictures.