Feature:1. Sensitive Design: Magnet speed sensor with high sensitivity, long life and stable output amplitude.2. High Accuracy: The electric bike speed sensor has a reliable data measurement range of 2‑5mm/0.08‑0.2in and is electromagnetic and vibration resistant. It provides precise support for the entire system.3. Good Performance: The speed sensor is IP65 waterproof and dustproof; simple to install and easy to use.4. Specially Designed: Professional single head speed sensor for Tong Sheng mid mounted motors only.5. Premium Material: The mid central motor kit is made of high quality plastic + rubber + magnets and is robust, corrosion resistant and long lasting.Specification:Item Type: Mid Central Motor KitMaterial: Plastic + Rubber + MagnetWire Length: Approx. 32cm/12.6in (Without Connector)Mounting Position: FrameWaterproof Rating: IP65How to Use:The mounting bracket and the speed sensor are assembled and mounted on , the magnet block is stuck on the wheel spokes and fixed with screws, the speed sensor is fixed, the sensor and the magnet block are adjusted to the distance and fixed. The speed sensor can be fixed to with a cable tie or wire rope (note: cable ties or wire rope are not supplied with the product and need to be provided by the customer).Package List:1 x Speed Sensor 1 x Magnet Screw 1 x Nut Note:1. Manual measurement please allow some errors.2. Only available for Tong Sheng mid mounted motors