handheld game console; portable game console
Refers to a portable electronic device designed for playing video games, such as a Nintendo Switch or PlayStation Vita. The longer form 携帯型ゲーム機 is also common.
See also: 携帯型ゲーム機 (けいたいがたゲームき)
When I was a child, I often played on a handheld game console.
The latest handheld game console has a very beautiful screen.