Connects to Turntable Output to ing Phono Level Up to Line Level12V DC Adaptor Included Load Impedance: 10K Ohms Reference Voltage: 1V Input Sensitivity / Impedance/PHONO 3 mV / 50K Ohms T.H.D. : 0.08 for 1 KHz 3 mV Input Output Level;2V S/N Ratio (with A-WTD);70 dB Frequency Response:20 Hz ~ 20 KHz ±2dB Dimensions (WHD):3.54"x2.13" x1.02" Weight : 0.88 Lbs