CORSAIR 4GB Padlock USB 2.0 Flash Drive - CMFUSBPADLOCK-4GB Auto-Locking; self locking after removal from computer Customizable PIN - set your own pin and make it easy to remember Easy to use - direct keypad access and indicator lights make locking/unlocking simple Plug and Play - hardware based security works without installing or running software Platform independent - works on windows, MAC and Linux platforms without installing a driver!