For Dell Inspiron 15-3521-0620, Dell Inspiron 15R-5537, Dell Inspiron 17R 5737, Dell Inspiron 17-5748, Dell Inspiron 7737 CN77304 internal SATA CD DVD Drive Burner Writer This dvd drive replace the broken dvd drive of your laptop. This dvd drive cannot be used in laptop without the existing dvd drive. 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 bare dvd 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, and then you can use it. 3. We will include one manual in package box for your reference, it is very easy to operate.