KNACRO Digital Tachometer PWM DC motor speed controller 30A DC 6V/12V/24V/36V/48V/60V (6v - 60v) Max power 1200W Promise electronic motor switch Input voltage: DC 6-60V.Output voltage: Load Linear. Input Current: require large than the motor operating current.Output Current: determine load size. Continuous current: 20A within.Maximum power: 1200W .Quiescent Current: 0.01ma. Speed type: modulated current.Speed mode: ON \ OFF linear potentiometer 270 degrees. Operating frequency: 15KHZ.Speed Percentage: support.