The player was the size of a credit card with a small LCD screen and navigation and volume buttons and would have held data of at least 8 MB of solid-state bubble memory chip with a capacity of 3½ minutes' worth of audio.
Plans were made for a 10-minute stereo memory card and the system was at one time fitted with a hard drive enabling over an hour of recorded digital music.
In a 2004 interview with The Guardian, Kramer stated that the company at the time had "orders worth £60 million" (value at current day) for the device from the recording industry.
[citation needed] In 2008, Kramer was called as a witness by Apple Inc. to defend itself from charges of patent infringement for its iPod digital audio player.
He acts as a technology advisor to International Clean Energy Circle (ICI) and a number of multinational companies.