The Rio Karma is a digital audio player originally made by the now defunct Rio

Rio (digital audio players)

Rio was the brand name of a line of digital audio players, best known for producing the "Diamond Rio" model that was the impetus for a lawsuit in 1998 by the Recording Industry Association of America...

. It was released in August 2003. It measures 2.7 × 3 × 0.9 inches (6.9 × 7.6 × 2.3 cm) and weighs 5.5 ounces (160 grams). It has a 20 gigabyte

Gigabyte

The gigabyte is a multiple of the unit byte for digital information storage. The prefix giga means 109 in the International System of Units , therefore 1 gigabyte is...

 (18.6 gibibyte

Gibibyte

The gibibyte is a standards-based binary multiple of the byte, a unit of digital information storage. The gibibyte unit symbol is GiB....

) hard drive. The Karma is notable for its support of Ogg Vorbis and FLAC

FLAC

FLAC is a codec which allows digital audio to be losslessly compressed such that file size is reduced without any information being lost...

 playback in addition to the usual MP3

MP3

MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is a patented digital audio encoding format using a form of lossy data compression...

 and WMA

Windows Media Audio

Windows Media Audio is an audio data compression technology developed by Microsoft. The name can be used to refer to its audio file format or its audio codecs. It is a proprietary technology that forms part of the Windows Media framework. WMA consists of four distinct codecs...

 formats, however it will not play MP2 format.