This is a 48V, 30A controller. These types of controllers are commonly (though not exclusively) used for E-bikes, electric scooters and electric mobility scooters. Input Voltage: 48VWattage: 800W. Current Limiting: 30APhase Angle: 60 or 120Under Voltage Protection:42V±0.5V. Case Dimensions: 190mm x 83mm x 40mm