Description:Product Category: Electric Bicycle ControllerMaterial: Aluminum alloyRated voltage: 24V/36VUnder-voltage protection: 20+0.5VSpeed regulator: 1-4 VMatching motor: 250 - 350W motorApplicable to: electric bicycle, scooter, etc.Size: About. 83 * 65 * 37 mm / 3.26 * 2.55 * 1.45 inchesWeight: about 120 gramsPackage list:1* Brush ControllerBe careful:1. Read the label on the controller interface to ensure that each interface is properly connected to the matching interface.2. For black and red thick power lines, red represents the positive electrode of the battery and black represents the negative electrode of the battery. Thick yellow and blue motor wires, positive extremely blue, negative extremely yellow. Ensure that the power cord is properly placed to prevent damage.Note:Light shooting 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.