TCC TC-450 Mobile (AC/Battery) Phono Preamp, Pre-amp (Preamplifier) battery powered; will work anywhere in the world (accepts optional AC adaptor) operates on one nine volt battery (not included); easily changed by removing two screws RIAA freq response 20hz-20,000hz +/- 0.5dB, S/N ratio &gt;70dB gold-plated jacks, black anodized metal casing and ground wire terminal; NO power indicator includes RCA cable and miniplug adaptor; CE certified, nice packaging suitable for gifting