This is a 48V, 25A controller with hall configuration. These types of controllers are commonly (though not exclusively) used for E-bikes, electric scooters and electric mobility scooters. Wattage: 500W. Current Limiting: 25A. Phase Angle: 60 or 120. Under Voltage Protection: 42V±0.5V. Case Dimensions: 150mm x 85mm x 43mm