Lenovo External USB DVD Burner (4xa0e97775) Physical specifications height 13.2 mm , width 136 mm , length 154 mm, weight 235g / Microsoft Windows 7, Microsoft Windows 8, Microsoft Windows 10 and 11 compatible The ThinkPad UltraSlim External USB DVD Burner is a small form factor external portable DVD and CD recordable drive that can be attached to Notebooks with USB2.0 ports or USB3.0 ports. With a 9.5mm UltraSlim engine, 20% slimmer than previous DVD Burner(0A33988). Average access time DVD-ROM 160 ms ,CD-ROM 140 ms, Sustained Transfer rate DVD-ROM 11.08 Mbytes/s (8x) max, CD-ROM 3,600 kB/s (24x) max, Legacy data Transfer mode UBS High Speed( 480Mbps) USB3 Full Speed( 12Mbps).