Specification: Brand new Casing material: Aluminium Size: approx. 103*70*35mm Rated voltage: DC 36V/48V Rated power: 350W Current: 16-18A Applicable model: electric bicycle, electric scooter. Feature: Anti-coaste, 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/E-ABS brake. High level/E-ABS brake. Brushless motor controller. Compact design for easy installation. Durable in use. 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. Package included: 1 x Brushless Motor Controller Note: Please allow 0-1cm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.