Transcend 240GB JetDrive 520 SATAIII 6Gb/s Solid State Drive Upgrade Kit for MacBook Air, Mid 2012 (TS240GJDM520) Compatible with mac book air 11 inch and 13 inch mid 2012 Max Seq. Read: 495MB/s, Max Seq. Write: 427MB/s. Mac Identifier - MacBook Air 5.1 Next-generation SATA III 6Gb/s interface. SSD upgrade kit included Free download of Jet Drive Toolbox SSD monitoring software External enclosure is fully compatible with SuperSpeed USB 3.0 & Hi-Speed USB 2.0 Operating Temperature 32F-158F. Repurpose original SSD into external SSD Dual color LED indicator (Power, data transfer and USB 3.0/2.0 connection)