Kensington Wireless Notebook Keypad/Calculator and Mouse Set 72273 2-in-1 calculator can be used as a stand-alone or full numeric keypad for quick data entry No messy cords--one wireless receiver connects both wireless mouse and keypad to your laptop Wireless optical mouse tracks precisely on virtually any surface Clear LCD display works in various lighting conditions Travel bag offers a tidy way to keep it all together and is ready to toss into your briefcase