PNY 4 GB Clip-On Attache USB 2.0 Flash Drive P-FDU4GBCL-EF/GRY (Grey) Innovative sliding hook that securely attaches to keys, backpacks, etc Ultra thin, metallic, sliding design High Performance USB 2.0 Flash Drive - work with Windows ReadyBoost to boost performance and system responsiveness in Windows Vista Compatible with most PC/MAC laptop and desktop computers with available USB 2.0 port (Backwards compatible to USB 1.0) High performance, low power consumption, non-volatile flash memory makes flash drives more durable than other storage devices