About this item:
- Converts high impedance unbalanced signals to low-level
   balanced signals
- Rugged construction
- Solid rubber feet
- Clearly printed schematic on top of cover
- Unbalanced Input/Output Impedance: 50K Ohms
- Using unbalanced output with equalising input allows dub
   effects
- Balanced Input/Output Impedance: 600 Ohms
- Balanced I/O is low noise for long-distance and weak signal
   transmit
- Ground button makes the noise of input lower when
   transmitting
- Attenuation button has 3 bands for adjusting input level:
   0dB, 20dB, 40dB.