but it’s not necessary to use a trackball since there’s a pair of rotary encoders and a mouse layer. This keyboard looks fantastic with its rocket ship MCU holder and its flush-mounted I/O ...

The trackball is very easy to use ... It is a shame to say, but the Sidekick II is still the king of QWERTY keyboards; not even the 3 can compete. The 3 features the exact same key layout ...

The keyboard with mini trackball is completely self-contained and connects via pogo pins. The main board holds the CPU. The EXT board has a fan and also provides I/O ports: USB, USB-C, Micro HDMI ...