This item is for electric vehicle using brushless hub motor. Item include: 1x Controller for brushless hub motor 1x Thumb throttle with LCD display Controller specification: Rated voltage: 24V / 36V / 48V / 60V Rated power: 250W ~ 350W Max current: 10A ~ 20A Lowest voltage protection: 20V / 31V / 42V / 52.5V 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, etc. White screen version: Color screen version: