1) This shell controller is a sample, we will send the controller shell with random color. 2) 1. Application model: Bluetooth programming module is suitable for VOTOL LADE controller, electric motorcycle, electric bicycle. 2. Register with wechat: The debugging software of the Bluetooth module must be registered with wechat, and successfully obtain the debugging software by using WORUM function. 3. The programming module has the advantages of high efficiency, stability, high sensitivity and high precision, supporting data import and forwarding programming. High performance: Bluetooth programming cable module can help controller programming to improve motorcycle engine performance. Plug and play: Bluetooth module is a set of basic circuit that integrates Bluetooth functions, and has plug and play function on the chip, which is reliable to use. Color: black Material: plastic Due to different product batches, the appearance may vary, which does not affect the use Package Contents: 1 x Bluetooth programming module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.