A quote here from
Digital Village:-
"The main features of the Apogee DUET include:
* Two channels of professional-quality 24-bit/96kHz audio input and output
* Two balanced XLR inputs, with selectable 48V phantom power on each input
* Premium, digitally controlled microphone preamps with 75 dB of gain
* Two unbalanced high impedance instrument inputs
* One high-level stereo headphone output
* Two unbalanced -10 dBV line outputs for powered speakers
* Multi-function controller knob for volume and input gain control and assignable MIDI control
* Multi-segment LED meters to display input or output levels
* FireWire 400, compatible with Mac OS X Core Audio
* Control functions built directly into Apples Logic Pro, Soundtrack Pro and GarageBand
* Compatible with any Core Audio-compliant audio application
* Apogees Maestro software for advanced control and low latency mixing
* System Requirements: Computer - Mac G4 1GHz or faster, G5 or Intel CPU. Memory - 1 GB RAM minimum, 2 GB recommended. OS - 10.4.10 or greater. Connection - FireWire 400 port
* Package contents include: Duet, Breakout Cable, FireWire Cable, Apogee Software CD and Users Guide"
Pretty nice for such a small interface. And for the price, I don't think I could say no either. Will be grabbing one when I make my Macbook purchase.
Hope that info helps