"NEC ND3540 16x16 DVDÂ±RW Dual Layer ReWriter - OEM (CD-018-NE)
The ND-3540 is the first drive to write dual layer media at eight speed. This new technologhy enables 8.5Gbyte of data to be written in only seven minutes. This makes the ND-3540 the market leader in high performance DVD writers."
Someone has their math wrong. Also their spelling.