SSD420K/420I (MLC) Featuring the latest SATA III 6Gb/s interface and a powerful controller, Transcend SSD420K/SSD420I are the ideal high-speed, lightweight and shockproof replacement for traditional rotating hard drives. With built-in Intelligent Power Shield (IPS), Transcend SSD420K provides extra protection to data integrity against sudden power failure or blackouts, whereas SSD420I has wider operating temperature allowing perfect functionality and reliability in extreme temperatures.