The DVO-1000MD is the only medical grade DVD recorder that features a built in hard drive. This recorder has two exclusive features DVO recovery™ and DVO fast™, making this recorder one of the most user friendly recorders Sony has ever designed. DVO recovery enables the end user to re-capture lost video due to an accidental power outage. DVOFAST enables you to remove a recorded disk in less than 2 minutes, no finalization is required. Other recorders can take up to 5 minutes to eject a disk. The DVO-1000MD employs industry standard MPEG 2 video compression to capture images with exceptional clarity, and has an 80 Gigabyte hard drive to store up to 30 hours of video.