TCC TC-400G/L Phono Preamp, Pre-amp (preamplifier) 12 volt DC operation; will work anywhere in the world gold-plated connectors, power indicator LED, ground terminal excellent choice for use with computer sound cards (includes free miniplug adaptor needed for this) Includes AC adaptor and RCA cable RIAA freq response 20hz-20,000hz, S/N ratio ^ 50dB