TCC TC-754 BLACK RIAA Phono Preamp With Three Switchable Aux Inputs; includes optional PREMIUM HIGH POWER AC Adaptor RIAA freq response 20hz-20,000hz +/- 0.5dB, S/N ratio 85dB available in black or silver finish; this is the BLACK VERSION 12 volt DC operation; will work anywhere in the world ground wire terminal; power indicator and switch includes PREMIUM AC adaptor, RCA cable and miniplug adaptor