M400 motor has new and old models, currently on sale is a new controller, please pay attention to whether the controller plug is the same as the controller interface of your motor Note: The replacement controller requires the use of the BESST tool, because the replacement controller needs to be matched with the motor before it can be used normally Due to different product batches, the appearance may be different, which does not affect use. Colour:As Shown Material:Plastic+Metal Package Contents: 1 * Mid Motor Controller(M400 36V 250W-CAN) 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.