LG 6x Blu-Ray Rewriter 8x DVDRW USB 2.0 Slim External Disc Drive BP50NB40 (Certified Refurbished) This Certified Refurbished product is tested & certified by LG to look and work like-new. The product includes all original accessories, and is backed by a 90 day warranty Buffer size: 4MB Burst transfer rate: USB 2.0 480Mbps USB interface Silent Play