Verbatim's professional optical media feature tighter specifications than the standards given by the relevant standardisation bodies. Tighter specifications ensure better compatibility with writers and recorders. This results in higher recording quality, thus ensuring longer archival lifetime and better readability. You can recognise Verbatim's professional optical media by the DataLifePlus branding.
The DVD-RAM Double Sided has a recording layer on both sides of the disc. 4.7GB capacity on each side. Simply record on one side, flip the disc over and record again.