Buyers need to know: You need change the motor wires, connect to the controller different color,untill the motor work smoothly,the controller didn't have the reset function.This item is for electric bike or electric scooter. Item include: 1x Controller for brushless motor 1x LCD display with thumb throttle Controller specification: Rated voltage: 24V / 36V / 48V Rated power: 250W ~ 350W Max current: 10A ~ 17A Lowest voltage protection: 20V / 31V / 42V Suitable for: 250W ~ 350W brushless hub motor (with hall sensor) LCD display function: Battery indicator, speed rank, bike speed indicator, single trip distance, total trip distance, single trip time, battery detailed voltage.