The ASUS DRW-24B1ST is capable of reading and writing data in DVD±R/±RW, DVD-RAM formats. It is a power saving drive and allows you to permanently delete the data on rewritable discs. This provides you with flexibility and efficiency in terms of multimedia data storage and sharing. E-Green (Energy Green Engine) The innovative drive E-Green Engine technology features an E-Green Mode that automatically closes drive applications when not in use to help conserve energy - helping protect the environment by decreasing CO2 emissions and reducing the depletion of trees. OTS (Optimal Tuning Strategy) With OTS, the drive will perform a test before burning which generates the optimal burning strategy automatically for the best burning quality.