1) This shell controller is a sample; the controller shell will be sent in a random color. 2) Application model: The Bluetooth programming module is compatible with VOTOL LADE controllers, electric motorcycles, and electric bicycles. 3) The programming module offers high efficiency, stability, sensitivity, and precision, and supports data import and forwarding programming. High performance: The Bluetooth programming cable module assists in controller programming to optimize vehicle performance. Plug and play: The Bluetooth module integrates Bluetooth functionality into a basic circuit and features plug-and-play operation on the chip for reliable use. Color: Black Material: Plastic Due to variations between production batches, the appearance may differ slightly, but this does not affect functionality. Package Contents: 1 x Bluetooth programming module Note: The actual item color may vary slightly from the image due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.