The controller is a sine wave three-mode controller, matching with Hall or non-Hall brushless motor with self-learning function Applicable to 36V350W 36V500W 48V350W 48V500W Hall or non-Hall brushless motor 36V48V/20A three-mode sine wave 9-tube controller + S830 LCD Meter set. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Black Meter Material:Plastic+Aluminum Package Contents: 1 * LCD Display(SM5+2PIN) 1 * Controller 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.