http://www.apogeedigital.com/products/one.php?section=features
Features
Single channel input using one of the following three options:
o Internal omnidirectional condenser microphone
o Balanced XLR microphone preamp input with +10 to 63 dB of gain
o Unbalanced 1/4” high impedance instrument input, 0 to 45 dB of gain
* Software selectable 48V phantom power
* Line-level, 1/8” stereo output for headphones or unbalanced powered monitors
* A/D and D/A conversion @ 44.1/48kHz, 24-bit
* Multi-function encoder knob for input gain control and output level control
* 4 encoder function LED indicators
* 3 segment LED input and output metering
* Apogee’s Maestro software for advanced control and low latency mixing
* Compatible with any Core Audio compliant audio application
* Dimensions: 4" W x 6.3" L x 1.5" H
System Requirements
* Computer: Mac, with an Intel or Power PC G5 processor
*Memory: 1 GB minimum of installed RAM, 2 GB recommended
*OS: 10.5.7 or greater
*Connection and Power: USB, powered by any available USB port on the computer