I think the earbud speaker is a nice looking design so I tried it myself but didnt seem to make any audible difference. I guess its just for aesthetics and not practical. Sorry! I am a very practical.
I like the jewelery design it has more potential. I can imagine as a compliment to the kids who come to jewel store. Possibly expensive.
The pitchman bragging about his B card, I think his card will be the first to get tossed out. Nowadays you just need a name title and website. That is more than enough. Maybe the first time you would like all that information but once you know about the person you dont need to carry that big chunk everywhere.