AcomData Enigma Fingerprint Security 500 GB USB 2.0 Rugged Portable 2.5-inch External Hard Drive BIO500UE (Black) Acomdata BIO500UE 500GB Enigma USB 2.0 BioMetric Ultra Drive is a ruggedized mobile external Hi-speed USB 2.0 Ruggedized yet sleek compact design Fingerprint biometric security with optional password login Powerful AES 128-bit data encryption - encrypt all, none or part of the drive No software to install on your PC Shock Water resistant enclosure Bus-powered - no power cord needed Three-year warranty