Apart BuzzStop-III, Universal Isolating Transformer, Universal stereo input adapter with ground lift, Convert any line, microphone or telephone signal into any output format, Converts unbalanced to balanced and vice versa, Integrated audio transformer prevents ground loops, Internal high quality audio transformer, passive, no power supply required, High-quality transformer 20-20000 Hz, Max. line level +12 dB @ 0.2% THD, Connectors: RCA and Euroblock, Input: Balanced 0 dB - 1 V, unbalanced 0 dB - 1 V, PA 100 V / 70 V / 33 V, Low Imp, 1 kW / 600 W / 120 W, Output: Balanced 0 dB - 1 V, unbalanced 0 dB - 1V, Specs: Max. +12 dB @ 0.2% THD