USB Bus power without using bulky AC adapter for ease of use with a laptop -Equipped with high-grade AKM 32bit DAC AK4390 -Power supply is built-in to reproduce the stable electrical supply -Condensers and OP amp are designed exclusively for audio applications -USB or digital (optical) input selector button -Headphones or RCA (analog) output selector button -Doubles as digital to digital converter from USB digital audio to optical output - . . .

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USB Bus power without using bulky AC adapter for ease of use with a laptop
-Equipped with high-grade AKM 32bit DAC AK4390
-Power supply is built-in to reproduce the stable electrical supply
-Condensers and OP amp are designed exclusively for audio applications
-USB or digital (optical) input selector button
-Headphones or RCA (analog) output selector button
-Doubles as digital to digital converter from USB digital audio to optical output
-Fixed sampling rate of 96 kHz with USB input
-Compatible with Mac OSX and Windows XP or later

http://www.fostexinternational.com/docs/products/HP-A3.shtml

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