UK CDr in pvc sleeve with plain black and white paper wraparound insert.

From the press release: one of four Eno albums released on 27th September 2004. .. the second in the series of Brian Eno reissues - The Ambient Works. The Original Masters were transferred by Simon Heyworth and all four albums have been Mastered using 'Class A' Analogue Electronics ... with the best Analogue to Digital conversions.

The albums in this tranche are:

Discreet Music
Ambient 1: Music For Airports
Ambient 2: The Plateaux Of Mirror
Ambient 4: On Land