The spec sheet for combo
Write/Read DVD-RAM Disc (2.6GB/5.2GB/4.7GB/9.4GB)
Write/Read DVD-R (4.7GB General)
Disc Write Capability Read Compatible with DVD Formats
Read Compatible with CD Formats
Specifications:
Model Number: LF-D311
Capacity: 4.7/9.4GB DVD-RAM (rewritable)
2.6/5.2GB DVD-RAM (rewritable)
4.7GB DVD-R General Use (write-once)
Data Transfer Rate (IF Interface): Ultra DMA Mode 2: max. 33.3MB/s
PIO Mode 4: max. 16.6MB/s
Write Data Transfer Rate: 4.7GB DVD-RAM 1385KB with verifying
2.6GB DVD-RAM 690KB with verifying
4.7GB DVD-R 1385KB without verifying
Read Data Transfer Rate: DVD-RAM (4.7GB): 2770KBps (2x)
DVD-RAM (2.6GB): 1385KBps (1x)
DVD-ROM: 8310KBps (6x)
CD-ROM/CD-R: 3600KBps (24x)
CD-RW: 1800KBps (12x)
Average Seek Time: DVD-RAM: 75ms
DVD-ROM/R, CD-ROM: 65ms
Write Compatibility: 4.7GB DVD-RAM
2.6GB DVD-RAM
4.7GB DVD-R (General)
Read Compatibility: CD-DA, CD-ROM/XA, Photo CD, Video CD,
CD-Extra CD-R, CD-RW at max. 24x
DVD-ROM, DVD-R at max. 6x
DVD-RAM (4.7GB at 2x, 2.6GB at 1x)
Buffer Capacity: 1MB
Power Supply: 12V/5V, ±5%
Dimensions (WxHxD): 146 x41.3x196 mm
5.75"x1.63"x7.72"
Weight: 1.1 kg (2.4 lbs.)