Logitech Squeezebox Duet. Audio formats supported: MP3, AAC, WMA, Ogg, FLAC, Apple Lossless, WMA, WAV. Audio D/A Converter (DAC): 24-bit. Display: LCD, Display diagonal: 61 mm (2.4 "). Minimum hard disk space: 80 MB, Minimum RAM: 256 MB. Battery technology: Lithium-Ion (Li-Ion), Data transfer rate: 10 Mbit/s, Compatible operating systems: Windows 2000, Windows XP, Windows Vista Mac OS X 10.3.5 Perl 5.8.3