This shell controller is a sample; the controller shell will be sent in a random color. Application model: Bluetooth programming module is suitable for VOTOL LADE controller, electric motorcycle, and electric bicycle. The programming module offers high efficiency, stability, high sensitivity, and high precision, supporting data import and forwarding programming. High performance: Bluetooth programming cable module helps with controller programming to improve motorcycle engine performance. Plug and play: Bluetooth module integrates Bluetooth functions into a basic circuit and features plug-and-play capability on the chip, ensuring reliable use. Color: black. Material: plastic. Due to different product batches, the appearance may vary, which does not affect functionality. Package contents: 1 x Bluetooth programming module. Only the listed package content is included; other items are not included. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.