The Kensington M01007 Notebook Keypad/Calculator With USB Hub is a versatile accessory that enhances your productivity and efficiency. It combines a full-featured calculator with a 19-key keypad and a 2-port USB hub in one compact device. You can use it as a standalone calculator or switch to keypad mode to enter data into your laptop or desktop computer. The USB hub allows you to connect other peripherals such as a mouse, keyboard, or flash drive. The Kensington M01007 Notebook Keypad/Calculator With USB Hub is compatible with Windows and Mac operating systems and requires no software installation. It has a slim and lightweight design that fits easily in your laptop bag or backpack. Whether you need to crunch numbers, enter data, or expand your connectivity, the Kensington M01007 Notebook Keypad/Calculator With USB Hub is the perfect solution for your needs.