This is a good tool to have in your back pocket to keep your pro audio systems sounding their best. Easily go between balanced and unbalanced inputs and outputs in stereo, in both directions at the optimal level and without hum every time. Use this to connect an unbalanced output from a CD deck, tape deck, or headphone jack of a computer, iPod or phone to the balanced input of your mixer, EQ or amp. Or use it to take the balanced output of a mixer or processor and go to an unbalanced tape deck or computer line in jack. Or do both at the same time while also adapting between RCA and XLR connections and adjusting levels.  Power supply included. And ask me about any cables you may want too. Maximum Output Level: +18dB BAL, +12dB unbalanced Maximum Input Level: +22dB balanced and unbalanced S/N Ratio: >90dB Input Gain: -8dB balanced/ +20dB unbalanced Power: 12V DC (Adapter Included)  Dimensions: 4.625 x 5.625 x 1.75 inches (92mm x 142mm x 45mm)