LiteOn SOHW-1693S 16x DVD-Dual Drive SMART-BURN technology avoids Buffer Under-Run error, automatically adjusting writing strategy to provide the best burning quality SMART-X (Smart Monitoring & Adjusting Read-speed Technology for eXtraction) VAS (Vibration Absorber System) to reduce vibration & noise during recording & reading Supports Double Layer DVD+R DLRecording Function Supports both 8cm and 12cm discs of CD and DVD types