8X Ext Slim DVDRW:Aluminium & Titanium Black USB2.0 - With Sony Drive Inside

12 cm and 8cm disc support Supports both 12 cm and 8 cm standard round type disc. Netbook booting support USB booting support for netbooks which don't include optical disc drives. Great choice for netbook users. Netbook booting supportUSB powered Maximum speed reading and writing is available with USB power. No AC adapter, power cord needed.  SUPER MULTI Support SUPER MULTI Buffer underruns Buffer underruns can cause serious problems during DVD burning as once the writing is started, it can't stop and resume flawlessly; thus the pause needed by the underrun can cause the data on the disc to become invalid. With this technique, the laser is indeed able to stop writing for any amount of time and resume when the buffer is full again. The gap between successive writes is extremely small.