Kensington Notebook Keypad/Calculator with USB Hub, 19-Key Pad 72274
Don’t struggle with those awkward number keys on your laptop anymore! The Notebook Keypad/Calculator with USB Hub is a full 19-key pad so your fingers glide quickly through data entry. Or switch to stand-alone calculator mode to easily make and enter calculations. Comfortable low profile, compact design. Cool bonus: keypad includes two USB ports for your extra accessories! Compatible with WinXP, Win2000 and Vista, USB 2.0 compatibility, no software needed.  Kensington 2-year limited warranty.