Fredenstein V.A.S. MicPre, 1-Channel Mic-Preamp, Vintage Sound, discrete OPAMP OPA2, American output transformer, +48V Phantom Power, Phasen Reverse, -20dB Pad, Low Cut, Input Impedance switchable 1500 Ohms to 300 Ohms, LED-Meter, XLR Mic-Input, Hi-Z Instrument Input Guitar/Bass (front), Line-Out XLR and 1/4" TR Jack, Insert 1/4" TRS Jack, Headphone-Out 1/4" TRS, build-in Power Supply, Power-Swicth, Housing/Dimensions: Desktop, 9.5" 1U