The ProtoArc XK01 Tri-Fold Bluetooth Keyboard is ready to make your business trips more productive. It’s full size, with a numpad and function keys, too. But it folds down to fit easily in a briefcase ...

Which foldable keyboard is best? Maybe you want to work on your next great novel on your iPad and don’t like the touch keyboard taking up so much of the screen. Maybe you want to type up long messages ...