Iomega 250GB Network Hard Drive. Hard drive capacity: 250 GB, Hard drive rotational speed: 7200 RPM, Drive device, buffer size: 8 MB. Weight: 907 g. Operating temperature range (T-T): 5 - 50 °C. Minimum system requirements: Microsoft Internet Explorer 5.0 or higher or Netscape 6.1 browser Apple Safari 1.0 browser, Power requirements: AC 110/230 V ( 50/60 Hz )