Crucial 256GB v4 2.5" 9.5mm SATA w/Laptop kit. Solid-state drive capacity: 256 GB, Size: 63.5 mm (2.5 "), Solid-state drive interfaces: Serial ATA II. Read speed: 230 MB/s, Write speed: 190 MB/s, Random write (4KB): 10000 IOPS. Bundled software: Data Transfer Suite. Operating temperature range (T-T): 0 - 70 °C, Operating relative humidity range: 0 - 95 %. Height: 9.5 mm