Lenovo ThinkPad Edge E420 E425 E520 E525 CD DVD Burner Writer Player Drive Burn CD's and DVD's, Play/Read CD's and DVD's 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 For Lenovo ThinkPad Edge E420, E425, E520, and E525