CJESLNA SATA 2nd HDD Caddy for 12.7mm Universal CD/DVD-ROM Improve laptop performance and capacity with extra hard drive Fully integrated into laptop, no cables/PSU/software driver needed. Uses 2.5" SATA hard drives 12.7mm-high Fast & Reliable connection in laptop, just as the primary HDD Note: Please check the below cool item, that will turn your original 12.7mm sata connection drive into an external DVD drive, better yet, no AC adapter needed; External case for 12.7mm Sata DVD drive.Only a case, not included any drive ); What is included: 1 x Hard Dive Caddy; 4 x Hard Drive Screws