LG Super Multi Blue Slim Portable with 3D Blu-ray Disc Playback and M-DISC Support BP40NS20 External - Connects via USB 2.0 Anti-scratch UV coating 6X BD-R Read and Write Capability Max. 6X DVDiAR Write Speed Blu-ray DISC (including BDXL), DVD (including M-Disc & DVD-RAM) 4MB Buffer Under-Run Prevention Function Embedded