This item is for electric bike or electric scooter. Item include: 1x Controller for brushless hub motor 1x Thumb throttle with WHITE LCD display Controller specification: Rated voltage: 24V / 36V / 48V Rated power: 450W (400W~450W) / 600W (500W~600W) / 1000W (800W~1000W) Lowest voltage protection: 20V / 31V / 42V Controller Size: 450W: 110x84x44mm / 600W: 147x84x44mm / 1000W: 178x84x44mm Suitable for: brushless hub motor (with hall sensor) For more information please feel free to contact me, thanks a lot. LCD display function: Battery indicator, speed rank, bike speed indicator, single trip distance, total trip distance, single trip time, battery detailed voltage, etc.