High Speed 4x Recording..
Panasonic introduces the world's first1 4x write-once Blu-ray Discs, available in 25 or 50GB2 capacity. The 4x speed performance can easily handle large amounts of data, including high definition content, with a maximum data transferspeed of 144 Mbps.
That means a 1GB folder can be copied in just one minute, while a DVD-RW with 2x speed needs six minutes. And with Panasonic's new phase-change recording technology, you get precise and stable recording even when writing at 4x high speed