The Link 2 Mobile Keypad and Flash Card Reader is an exceptional addition to your computer or laptop for more convenient and accessible numerical keypad. With an additional 2 USB 2.0 hi-speed ports and a built in 6-in-1 card reader/writer, this multi-functional keypad also serves as a conduit for all of your technological nuances. With this USB POWERED PAD, you can upload data or digital photos from you CF, MD, SM, MMC, SD, MS, and MS Pro cards. The over current detection offers protection for all ports from power surges and short-circuiting of connected devices. Also included is an SED indicator that allows you to monitor its linkage status. Compatible with Windows XP/200/ME/ 98SE, MAC OS X/8.6 and higher, this multi- purpose keypad is the comfortable option that keyboard users have been waiting for.