Cable Connectivity - USB Interface - 19 Key - Compatible with Computer (PC) - Built-in USB Hub, Calculator 3-in-1 design 2 USB ports for your extra accessories One button to quickly switch between keypad and calculator Use clear LCD various lighting conditions No software needed; just plug it in to use. Combo offers a fast, convenient way to enter numeric data. This one smart device is a calculator, full 10-key pad and USB hub all in one. Integrated USB hub features two USB ports for your extra accessories. Quickly switch between keypad and calculator with a simple press of the mode button. Clear LCD works in various lighting conditions. Device does not require software. Simply plug it in to use. System Requirements Operating System(s): Microsoft Windows XP Microsoft Windows 2000 Microsoft Vista
