Some ThumbUp! keyboards can use nice!nano v2 controllers with ZMK firmware which makes them wireless over Bluetooth connection. Bluetooth Profiles Keyboard supports four simultaneous Bluetooth connections, you can switch between them by pressing Tab (the key under Escape in the leftmost column) and W, E R, T (for connections 1 to 4). To reset/forget the currently selected connection press Tab+D. For example to connect your primary computer as connection #1 - press Tab+W, then Tab+D, initiate the Bluetooth pairing on the computer, select ThumbsUpV5 in the list of available devices. If/when prompted to enter PIN/given numbers - type them in and press enter (the second from the bottom key in the rightmost column.) Then to connect to the phone in the second slot - press + Tab+E, then the same with Tab+D and so one as listed above for the computer connection. Once you have those two connections established you may switch between them by pressing Tab+W and Tab+E. You may switch to the unused...