There was a video of a folding keyboard from the Japanese company Grab Shell, which, when folded, can be used as a game controller.
As noted, when folded, the controllercan be held with both hands. All functions of the full QWERTY keyboard remain available. In this case, the user can directly configure many additional buttons for himself. Also, the keyboard is equipped with a trackball, joystick, toggle switch and scroll wheel.
The gadget is paired with computers running Windows and macOS via a wireless interface. Grab Shell is powered by a 2000 mAh battery.
The cost of the keyboard is $299, or about 22.6 thousand rubles.