The Matias Half-QWERTY Pro Keyboard is the latest version of the full-size Matias one-handed typing keyboard. It features Matias Quiet-Click mechanical switches for a better typing experience, has 3 USB 2.0 hub ports that provide a convenient spot to plug in a mouse, and includes two micro-USB to USB-A cables, so that you can choose the length of cable that best fits your assistive technology needs. (The micro-USB end of the cable plugs into the Matias keyboard, and the USB-A end of the cable plugs into the computer). The Matias Half-QWERTY Pro Keyboard replaces earlier versions of the Matias one-handed typing keyboard, including the Matias Half-QWERTY Keyboard (2001-2005), Matias 508 Keyboard (2005-2009), and Matias Half-QWERTY 508 Keyboard (2009-2021). All of these keyboards use the same proven technique for one-handed touch typing that has worked so well over the years for many people.