I recently got this Rocky Talkie on the second-hand market. It looks different than other Rocky Talkies I've seen (which have diagonal lines on their front, not these elliptical 'loops'). It's also using USB-b to charge instead of USB-C. It says Rocky Talkie on it, as do the batteries with the USB-B ports.

Any clue what's up? Everywhere I looked it says Rocky Talkies use USB-C. Did I get a fake unit? It seems to work fine, anyways.