SanDisk expanded its Memory Stick Micro (M2) line by introducing a 4GB card. With the capacity to hold up to 1,000 songs, 2,000 high-resolution photos or 20 hours of MPEG4 video, the 4GB M2 is compatible with Sony Ericsson’s latest generation of slim line, multimedia mobile handsets such as the Cyber-shot and Walkman series.