TCC TC-754 BLACK RIAA Phono Preamp (Pre-amp, Preamplifier) With Three Switchable Aux Inputs and Variable Output Level RIAA freq response 20hz-20,000hz +/- 0.5dB, S/N ratio 85dB Source indicator LEDs; power-off setting retention 12 volt DC operation; will work anywhere in the world Ground wire terminal; power indicator and switch Includes AC adaptor, RCA cable and miniplug adaptor