I didn’t know these existed, they really come in handy when traveling. The issue is when I travel I don’t like depending on my phone for the Qibla direction because more times than not it has messed up the direction. A watch however doesn’t depend on GPS/Internet but rather on a built-in compass.
I did a little search and found there are actually many different types of Qibla watches, the one above is supposedly the best one. Costs $99 and is manufactured by Casio, [here] are better looking ones by Casio too. It can also alarm you when it’s prayer time.