I see. Just another form of sending out a "dimensional mailer" via FedEx to a prospective client—like the classic approach of enclosing a $20 bill with a sales letter saying "I sent you this $20 because I want you to get used to making money as a result of our working together."
Except instead of cash, he's sending tablets. Same psychology: send something physical and valuable to break through the noise, create obligation, and prime them for the pitch. Classic direct response.
However, I would never use a device that was sent to me by a random stranger in the mail. Lol there's no telling what's on that thing. It would be interesting to disassemble it though, and plug it into a sandboxed VM to find out if there is actually anything nefarious installed.
It says "electronic LCD tablet," but you say it doesn't connect to WiFi. Does it have an OS? What does it do? I am genuinely curious.