The Sony BC-5500S achieves 4x speed when reading 25 GB BD-R and BD-RE media,50 GB dual-layer R and RE Blu-ray media. When storing data on DVD-Rs/DVD+Rs, it reaches 8x speed and handles DVD-RAMs (max. 5x DVD speed) and DVD-RWs/DVD+RWs (max. 6x/8x) dynamically. the Sony BC-5500S is compatible with most brands of laptops with 12.7mm sata tray-loading internal optical drive, such as HP, Sony, Dell, Toshiba, Acer, ASUS, Sumsung laptops. Model: BC-5500S Brand: Sony Manufacturer: Sony Condition: Brand New without manufacturer retail packing. Type: Blu-ray Player Loading: Tray-Loading Material: Aluminium Color: Silver Net Weight: 170g Net dimensions: 128mm x 12.7mm x 129mm Gross Weight: 180g Warranty: 1 year seller warranty v 4x BD reading (for Data) v 8x DVD±R writing v 5x DVD-RAM writing v 8x DVD-ROM and 24x CD-ROM reading Best Customer Experience v - Read 25 GB BD-R/RE BD Media v - Read 50 GB Dual-layer R and RW BD Media v - Light Weight at 200g v - 4.5 MB Buffer Memory for optimal playback peformance Read Maximum Speed: BD SL: 4x (for Data) BD DL: 4x (for Data) DVD-ROM SL : 8x DVD-ROM DL : 4x DVD+R : 8x DVD-R : 8x DVD+R DL : 4x DVD-R DL : 4x DVD+RW : 4x DVD-RW : 4x DVD-RAM: 5x CD-ROM : 24x CD-R : 24x CD-RW : 16x Write Maximum Speed: DVD+R : 8x DVD+R DL : 4x DVD+RW : 4x DVD-R : 8x DVD-R DL : 4x DVD-RW : 4x DVD-RAM: 5x CD-R : 16x CD-RW : 10x Access time (typical): BD 320 ms DVD 200 ms CD: 190 ms Mechanism: Tray loading Interface: P-ATA: BC-5500A S-ATA: BC-5500S Burst transfer rate: PIO mode 4 Ultra DMA 33 Cache Memory: 4.5 MByte Media supported: BD-ROM BD-R BD-R DL BD-RE BD-RE DL DVD-ROM DVD-R DVD-R DL DVD-RW DVD+R DVD+R DL DVD+RW DVD-RAM CD-ROM CD-R CD-RW with 80mm and 120mm diameter