Product Description The Transcend 480GB JetDrive 725 SATA III JetDrive Internal SSD TS480GJDM725 is a replacement SSD with 500 MB/s read and 430 MB/s write speeds for your MacBook. This upgrade kit includes tools, instructions, and an enclosure case that is less than 0.5" thick for housing your original drive. Inside the kit are two types of screwdrivers and a step-by-step guide on how to open your MacBook and copy over the data from your original drive to the JetDrive SSD. 480GB Internal SSD; SATA III 6 Gb/s Interface Sequential Read 500 MB/s; Sequential Write 430 MB/s Aluminum Enclosure Kit Compatible with MacBook Pro Retina 15" (Mid 2012, Early 2013) Dual color LED indicator (Power, data transfer and USB 3.0/2.0 connection)