When you choose the Key Tronic 6101 Series keyboard with Windows keys and youll get the experience and commitment to excellence thats made Key Tronic Corporation the worlds leading manufacturer of computer keyboards and input devices. And now one of our most popular keyboards has USB technology. The E06101USB-C and E06101USBB keyboards have two USB port hubs conveniently located on the keyboard for plug-n-play USB devices. The keyboard uses one of the USB ports on the computer. The E06101USBB has the Key Tronic Ergo Technology. Most keyboards use a standard 55 grams of force required to register every key, Ergo Technology has 5 different levels of force. From 35 grams to 80 grams - that correspond to the strength of the finger that touches the keys. The result is more comfort for your hands