Iomega REV 35GB/90GB ATAPI. Hard drive capacity: 35 GB, Hard drive rotational speed: 4200 RPM, Write seek: 13 ms. Weight: 850 g, Height: 25.4 mm, Width: 101.4 mm. Operating temperature range (T-T): 0 - 45 °C, Storage temperature range (T-T): -40 - 65 °C, Operating relative humidity range: 8 - 90 %. Bundled software: System Software, Iomega Automatic Backup Pro, Norton Ghost. Minimum hard disk space: 100 MB, Minimum processor: Pentium II 333 MHz, Minimum RAM: 128 MB