TCC TC-720 Stereo Microphone/RIAA Phono Pre-Amp, Preamp (Preamplifier) 12 volt DC operation; will work anywhere in the world Includes AC adaptor, RCA cable and miniplug adaptor Ground wire terminal, power indicator; gold plated jacks and black anodized metal casing Switchable RCA phono or 1/4" microphone inputs; switchable for condensor or dynamic mikes RIAA freq response 20hz-20,000hz +/- 0.5dB, S/N ratio 75dB