Kilobits Per Second = (kbps)
1,024 kilobits = 1 Megabit (Mb)
Recording time on a 2GB SD Card:
64kbps ~ 70 hours
128kbps ~ 35 hours
192kpbs ~ 26.25 hours
An average song length of 4 minutes recorded at 128kbps takes up about 3.75MB of memory. So, a Sangean PR-D8 with a 2GB SD Card can store 500+ songs recorded at 128kbps.