Anti-, vercurrent protection. Automatic identification the 36V and 48V. Automatic identification the Hall sensor. Automatic identification the Phase angle of 60 degrees and 120 degrees. Low level brake. High level brake. Brushless motor controller. Compact design for easy installation. Durable in use.Brand newCasing material: AluminiumSize: approx. 103x70x35mmRated voltage: DC 36V/48VRated power: 350WCurrent: 16-18AApplicable model: electric bicycle, electric scooter.Controller Installation Method:First, confirm the positive and negative poles of the power supply. The positive and negative poles of the power supply must not be reversed. Other functional lines can try to connect until they are connected rightly.1. The self-learning line is inserted first.2. Connect the power cord and note that the positive and negative poles should not be reversed. Connect the electric door lock line, Hall line, phase line, and turn line.3. When the power is turned on, the motor will rotate. After it has stabilized its rotation, if it is reversed, pulls off the self-learning line, and then it plugs in the self-learning line. It will rotate foreward. After it is stable, unplug the self-learning line is ok.4. After the controller learns it well, pick up the features you have on your car, such as anti-theft, three-speed, reverse, power off, and power assistance.Colour: silver whiteMaterial: metalPackage Contents:1 * Ebike Motor ControllerOnly the above package content, other products are not included.Note: Light 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.