2 CD full of from one to the copying machine, the two drives the same time, directly to CD, CD replication, duplication speed of the CD selection, self-diagnostic start Supply on your hard disk to add options And an optional USB 2.0 connection to duplicate the self-recognition in the future on upgrading computers, the form of automated CD, and drive technology stability in the recording of the CD upgrade to a future upgrade capabilities of the LCD Nice interface and easy to read, both on the track, one-hour support of the disc - the regime after the alarm buzzer continuous cooling-off period without duplication.