36V/48V 350W Electric Bicycle Scooter Brushless DC Motor Speed Controller Product Features: Voltage: 36V/48V Power: 350W Throttle: 1-4.2V Short circuit protection: 31.50.5V/420.5V Color: silver Dimensions: 105 x 70 x 35mm/4.13 x 2.76 x 1.38 Casing material: Aluminum Instructions for use Turn off the power before connecting the cables. 1. Connect the learning switch. 2. Connect the motor cable (phase A, phase B, phase C). Then connect the Hall connector. 3. Connect the power and the rotating handle connector. 4. Turn the rotating handle. If the motor rotates in the opposite direction, disconnect the learning switch and then reconnect the learning switch. If the motor does not rotate, check the cables. If the motor rotates forward, go to step 5. 5. Let the motor run for at least 1 minute and disconnect the learning switch. 6. Turn the rotating handle. If the motor works normally, connect other cables. If not, adjust the rotating handle cable until the motor works normally. Package 1X Electric Controller