From MP3Car.com Wiki
Roland UA-1EX
* Up to 24bit/96kHz audio quality
* ASIO 2.0 (Win/Mac), WDM (Win2000/XP), Core Audio (Mac OS X) compatibility
* USB Powered (no AC adaptor required)
* S/PDIF optical In & Out
* Supports both OS-standard drivers as well as Edirol’s drivers* (Win/Mac OS X)
Roland UA-25
* Solid aluminum chassis — portable and durable
* Premium audio quality
* Wide variety of I/O
* Built-in analog limiter
* Zero-latency direct monitoring
* USB-powered phantom powered preamps
* +4 dBu output for pro applications
* Supports ASIO 2.0, WDM, MME, and Mac OS X CoreAudio
Roland UA-101
* Dedicated monitor output
* Balanced I/O
* Included Signal Router/Mixer application
* Built-in limiter
* 40-bit internal processing
* MIDI I/O
* Optical S/PDIF (ch. 9-10)
* Low-latency drivers: WDM, ASIO 2.0
* High-speed USB (USB 2.0) and full-Speed (USB 1.1) compatible
