I remember the early Casio GPS wristwatches. There was a problem with them that spawned this joke:
An airport passenger asked a fellow traveler carrying two suitcases:
"Excuse me sir, but I forgot my watch, would you happen to know what time it is?"
"Of course. What time zone?" was the reply.
"How many time zones does that watch have?"
"All of them. In addition to that, Color TV and GPS."
"Oh... that is fancy. You wouldn't mind selling it, would you?"
"Well, the novelty is wearing off. If you got $1000 in cash, it's yours."
"Here is your $1000."
"And here is your watch. Wear it in good health."
Then the stranger hands over the two suitcases.
"Oh I almost forgot, here are your batteries."