Versatile Compatibility: Compatible with all models of electric bikes, ensuring broad applicability across various brands and designs. Durable Construction: Crafted from high-quality aluminum alloy and PA6 materials, ensuring long-lasting durability and reliability Precise Dimensions: Compact in size with dimensions of 14.4 x 7.4 x 7.5cm, offering a snug fit while remaining unobtrusive during installation Easy Installation: Installation instructions are provided via an accompanying video guide, facilitating a straightforward and hassle-free setup process Specifications: Product Model: CS-1855A1 Product Net Weight: 163g Product Material: Aluminum Alloy, PA6 Product Dimensions: 14.4 x 7.4 x 7.5cm Applicable Pipe Diameter: Diameter 2.2cm Applicable Range: Suitable for all models of electric bikes Installation Instructions: Please refer to the installation video If there is no Hall sensor ring, you can use it with a cable-operated Hall sensor kit. (If the original scooter has been modified and equipped with one, it can be used directly. If not, it can be purchased online or from us.) If there is no Hall sensor ring, you can use the electronic throttle. (Our company produces electronic throttles.) (Note: Non-original electronic throttle cores may not be directly installable. When using, the electronic throttle core may need to be finely polished. You can rest assured to polish it, which will not affect the later use of the product.) If the original scooter is equipped with a U+B or N1S Xiaomi Hall sensor ring, you can use our dedicated Hall sensor ring core components (our company produces them) and install them directly.