Matias Folding Keyboard The Matias Folding Keyboard is a full-size keyboard that folds in half for travel. High-quality dome switches give the keyboard a responsive, tactile feel, with enough resistance to hold the weight of your hands. A Tab key on the number pad allows one-handed number entry into forms and spreadsheets, leaving your other hand free to hold or flip through information being entered. The keyboard also has the standard volume controls: Volume Up, Volume Down, and Mute  as well as function keys, page navigation keys, and cursor keys. USB