How can you tell if a dvd player has multiregional capabilities?

Below is a question someone had about DVD players:I’m in the market for a new dvd player, and I want to be able to play dvds from any region code. Where would I look to see if a dvd player has multiregional capabilities? Is it some sort of symbol?

Also, if you know of a dvd player that has multiregional capabilites, please let me know!