Freecom FHD-XS 40 GB ultra slimline. Hard drive capacity: 40 GB, Hard drive rotational speed: 4200 RPM, Hard drive interface: USB 2.0. Weight: 150 g. Operating temperature range (T-T): 5 - 60 °C. Minimum system requirements: PC: Pentium-II 233MHz or higher, 64MB RAM, CD-ROM drive Available USB 2.0/1.1 port Mac: , Power requirements: USB bus powered, no AC Adapter needed, Track to track seek time (read/write): 3 ms