"..With market leading transfer rates of 10X for DVD-ROM (13.5 MB/s) and 40X for CD-ROM (6 MB/s), the new drive operates more than 40 per cent more efficiently than its predecessor and supports multiple disc formats including DVD-R and DVD-RW. It also comes with improved seek and access times of 90ms and 100ms for DVD-ROM and 70ms and 80ms for CD-ROM and is completed with ATAPI (DVD-AO4SZ) interface.
The drive can read both single and dual layer DVD discs. In comparison to a CD-ROM disc, a single-sided, single-layer DVD disc offers seven times the capacity and a double-sided, dual-layer DVD disc, 26 times the capacity.

Product features: 512 Kbytes buffer memory Digital audio output (ATAPI only) Front panel headphone jack and volume control knob Compatible with Windows 98 Plug and Play standard, Windows NT3.51/4.0, Windows 3.1, MS-DOS6.0 or later

The DVD-A04SZ is equipped with Pioneer's slot-in disc loading mechanism, featuring a chucking system for safer disc handling, as well as enabling horizontal and vertical mounting for added flexibility, making it ideal for the requirements of OEMs. Like Pioneer's other DVD-ROM drives, the mechanism grips the disc by both edges without touching the data surfaces and operates gently to eliminate any risk of damage. In addition, ejected discs are held in the slot with the central hole visible to allow discs to be removed without leaving fingerprints on the data surfaces.."