The MP13 is a small- simple- and inexpensive microphone pre amplifier for a variety of applications. The unit has XLR and 1/4- Outputs- XLR and 1/8- Inputs- and a single Gain control with a Clip indicator. Switchable Phantom Power is included for use with a condenser microphone. The unit comes complete with a power adapter.Small size.Works with dynamic- Phantom and Heaset mics.XLR and 3.5mm inputs.XLR and 1/4- outs.Works with 9 to 15 Vdc.Specifications:Input Impedance: 10K Ohms balanced/unbalanced.Max Input Level: +4dBV XLR balanced- +10dBV unbalanced.Max Gain: XLR 60dB- 1/4- 54dB.Phase Shift: <10 deg. 20 Hz - 20 kHz.EIN: -108dB max.THD: <.01%.IMD (SMPTE): < .01%.CMRR: >80 dB.Phantom Power: +24 Volts- 6 mA.Power: 12-15VDC.Size: 3.4- x 4.2- x 1.4-.