Features: Brushless Motor Controller for Electric bike and scooter. Low noise, High efficiency, stable voltage. Function: Anti-coaste, vercurrent protection. Automatic identification the Hall sensor . Automatic identification the Phase angle of 60 degrees and 120 degrees. Low level brake. PAS-sensor. Easy and simple to install and use. The wire and interfaces are durable, and ensure low malfunctions of long-time use. Package Includes: 1x Brushless Motor Controller Specifications: Material: Aluminum-Shell Rated-Voltage: 24V/36V, 36V/48V Rated-Power: 250W/350W Size: Approx. 90x52x30mm/3.54x2.05x1.18inch Applicable Model: Electric bike, Electric Scooter. Controller Installation Method: 1. Connect three motor wires (this one has no positive and negative poles, and can connected freely). 2. Then connect the power lines. Make sure that the positive and negative poles are not connected reversely. 3. Connect the learning lines. After the learning lines docked, plug in the power supply. If you turn on the power supply and check whether the motor rotates automatically, pull out the learning lines directly for forward rotation. If you pull out the learning lines reversely, the dockings will become forward rotation, and then pull out the learning lines. 4. Connect Hall wire, pay attention to positive and negative poles, red positive pole and black negative pole. 5. Connect the red positive pole and black negative pole of the throttle lines 6. Connect the brake cable. After connecting with the lines, the electric bike can operate normally. If other functions are needed, connect them as needed. note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Have a great time shopping!