SUNIX KEY-256UN1 iSafe USB 2.0 SecureKey Specifications: Interface : USB2.0, compatible with USB3.0 NFC (Near Field Communication) Application: Data encrypt with AES 256-bit standard Secure data auto-synchronizes with cloud storage Encrypted data sharing Ceate an encrypted local disk partition Smart PC lock IP57 dust and water resistant certification OS Support: Windows 7, 8, and 8.1 Android 4.2 or above (with NFC hardware feature) Power: USB Bus power 1.5W @ 5VDC Dimension: 72.3L x 12.1W x 24.4H mm (0.24L x 0.4W x 0.8H ft) Weight: 8.1g (0.28oz) / unit