23 in 1 USB 2.0 Card reader. Model: CR4200. Features: Use as a USB Flash Drive by inserting Memory Card USB 2.0 Plug-n-Play Compatibility Supports HC (High Capacity) Memory Cards PC & Mac Compatible Package Contents: 23 in 1 USB 2.0 Card reader User's Manual Warranty Information System Requirements: PC & Mac Compatible Windows 2000, XP and Vista Mac OS 10.2 or Above Available USB Port