Lite-On DS-4E1S SATA BD-ROM Blu-ray Combo Optical Drive Repaclement for DS-4E1S DS-6E2SH Read Speed: BD: 6x max. DVD: 8x max. CD: 24x max. Write Speed: DVD-R: 8x max. DVD+R: 8x max ; DVD-RW: 6x max. DVD+RW: 8x max ; DVD-R DL: 6x max. DVD+R9: 6x max ; CD-R: 24x max. CD-RW: 24x max Compatibility: All Windows OS NOTE THAT : 1. Our optical drive is just a Blu-ray drive WITHOUT any original accessories( faceplate, mounting frames, hooks, brackets) 2. If you replace your old optical drive by yourself, you just need to remove your old optical drive's accessories with a screwdriver, then install them on our optical drive, then you can use it. 3. We will include one manual in package box for your reference, it is so easy to operate.