The Kensington Laptop Keypad Calculator K72274 was tested. It is a USB wired keyboard designed for use with laptops and other computers. It features a black external design with a keypad layout and 19 keys, making it suitable for quick calculations and input tasks. Compatible with Microsoft Windows Vista, XP, Mac OS X, and other operating systems, this keyboard is easy to connect via USB and offers a convenient solution for those in need of a compact and efficient external keypad for their computer setup.