It’s an overpriced, gimmicky, speciality device.
Listen to Alton Brown on this one:
“Don’t ever buy unitaskers”.
If you want a copy/paste extrenal hotkey, go buy an external (even wireless) numpad off Amazon for like $10-20 and reconfigure the whole thing to be a wireless do-whatever-the-hell-you-want pad.
Copy, paste, undo, redo, print, open literally any app, run macros, volume up/down, media play/pause/stop…I could go on and on.
Windows users can find ease in remapping with AutoHotkey.
Linux users shouldn’t have a difficult time remapping scancodes from a specific device to do other actions.
Either type of user has a plethora of articles to learn from.
I mean, if you want to pay $30 for a novelty POS like this, have at.
Otherwise, pay up to 2/3 less than that and make yourself something way more versatile and customizable.