HP B4F70AA, Black, Desktop, Blu-Ray RW, Serial ATA, 40x, 40x HP B4F70AA. Product colour: Black. Purpose: Desktop, Optical drive type: Blu-Ray RW, Interface: Serial ATA. CD write speed: 40x, CD rewrite speed: 40x, BD-R write speed: 8x. CD read speed: 40x, BD-ROM read speed: 8x, DVD-ROM read speed: 16x. Weight: 950 g