1 to 7 CD DVD burner duplicator tower provided by Copystars was designed for heavy duty users. Power supply is UL,FCC and TUV listed . It is crucial element to ensure the highest standard of safety and reliability. The CD track edit function compile multiple tracks of audio onto a single disc from multiple sources. Support CD/DVD burning DVD-R, DVD-RW, DVD+R, DVD+RW, DVD+R double layer, DVD-R dual layer, mini DVD-R, CD-DA, video CD, photo CD (single & multi-session), CD-TEXT, DC-extra, CD-R, CD-RW, business card CD-R, 3" mini CD-R. The duplicator burning speed for full 700 MB CD is less than 3 minutes and it takes about 6 minutes to copy full 4.7GB DVD discs simultaneously for all target drives. This DVD burner copier tower is also capable of duplicating Dual Layer (DL) DVD media discs. Fast DDR2 buffer memory-memory speed 4X faster than competing models using SD RAM other features such as: Multi-language support-language is displayed in: English, Spanish, Portuguese or Japanese, dual-level security-separate startup & setup passwords to prevent unauthorized usage. Advance function included: Prescan, compare, test (simulation of copy),track edit, CD overburn, firmware update and many more. Maximum writing speed DVD+/-R: 24X, DVD+/-RW: 8X;DVD+/-DL: 8X, CD-R: 52X, CD-RW: 32X supported disc formats DVD-ROM, DVD-R, DVD-Video, DVD-RW, DVD+R, DVD+RW, DVD+R9, CD-DA, CD-ROM mode 1, CD-ROM XA mode 2, multi-session photo CD , CD-I, video CD, CD extra (CD plus). Supported recording discs 12cm 4.7GB DVD-R/RW, 12cm 4.7GB DVD+R/RW, 12cm 8.5GB DL DVD, 12cm 80 min/700MB CD-R, 12cm 74min/650MB CD-RW, 8cm 1.47GB mini DVD-R, 8cm 24min/210 MB mini CD-R, 8cm 50 MB business CD-R. All Copystars DVD duplicator carry 3 years labor and 1 year parts warranty, unlimited 1800 toll free support.