SATA Half-Height Internal DVD + R / DVD + RW / DVD-R / DVD-RW / DVD + R9 / DVD-R9 / DVD-RAM / DVD-ROM / CD-R / CD-RW / CD-ROM Combo Drive Automatically write strategy & adjustment, double layer DVD +/- R9 recording function supports SMART-BURN avoidance buffer underrun error. To provide the highest combustion quality SMART-X function, walking OPC adjusts CD-DA/VCD/DVD data extraction to the fastest tolerance based on data requirements from both host and disc quality. ABS system reduces vibration and noise during recording playback. Enable 2 drives to supply power - This is a combo kit that includes a 4-pin LITE-ON Super Drive splits two SATA connectors into two SATA connectors. Combo kit also comes with 4 screws to lock in your drive and the Nero12 Essentials program