na-adjective, noun
Describes devices, tools, or items designed to be easily carried or moved. Functions as both a noun and a na-adjective.
ポータブルスピーカーを持って公園に行った。
I took a portable speaker to the park.
このゲーム機はポータブルなので、旅行に便利
This game console is portable, so it's handy for travel.