Technolink TC-770LC High Gain Phono/Mic/Aux Preamp S/N ratio: MM phono/MIC 76dB, AUX 90dB RIAA freq response: 20hz-20,000hz +/- 0.5dB Switch selectable dynamic or condenser mic compatibility; Condenser bias supply voltage: 7.5VDC Input sensitivity; MM phono 3.5mV, MIC 8mV, AUX 250mV Variable output level control with power switch; free RCA cable and miniplug adaptor included One year defective exchange or repair warranty