Features: Rockville TubeHead Tube Headphone Amplifier, Tube: 6K4 (These are great quality and engineered to sound best in this amp), 3.5mm audio line input, RCA line input
S/N Ratio: 106dB, Volume control knob, Toggle Switch on/off, Selectable Line 1 and Line 2 input selection switch, Power light indicator
Gain: 1.89 dB with 0.775Vrms input @ 32ohm impedance, Crosstalk: 70 dB, DC Power Supply: 12V 1A, Universal 110/220 power supply for worldwide use, Unit Weight: 1.02lbs, Unit Size: 3.94 x 3.74 x 0.9 inch ( L x W x H)