Notebook Keypad/Calculator with USB Hub

Notebook Keypad/Calculator with USB Hub 3-in-1 design: use as either a fully functional calculator or a 19-key pad for data entry or a USB hub. Integrated USB hub has 2 USB ports for your extra work accessories. Quickly switch between keypad and calculator with a simple press of the mode button. Clear LCD display works in various lighting conditions. No software required, just plug it in to use. Operating System Compatibility: NA; Connector/Port: NA; Cable Length: NA; Compliance, Standards: NA.