What does he like? This is a question you should think about for all gift recipients.

First think about what he likes.
Braille playing cards, a nice phone case if you know what kind he has, a key chain based around what he likes, headphones, or go with the good old gift card. If you know him online, it's simple and easy, and most gift cards can easily be used online. Unless the website isn't accessible. Accessible sites are Amazon, target, walmart somewhat, not sure of others.
Yours isn't the first post this year. Something to keep in mind is that unless you get something highly visual, you'll be fine. A coffee mug for example. Used by blind and sighted alike.

If he likes games cards with braille on them can be very helpful!