Duel Gazer

A Duel Gazer, known as a D-Gazer in the Japanese version, is a device in Yu-Gi-Oh! ZEXAL which is worn over a person's eye. It allows the wearer to watch duels in an augmented reality setting.

In anime, they have been shown to be used as communicators, such as phones. They have also been shown to link together two different Duel Gazers for Duels and allow any other Duel Gazers to link to the Duel to see it. This most likely allows spectators to follow just one Duel even if there are multiple Duels using Augmented Reality occurring in the local area. They can also be used to check set cards if a player forgets what card they set and its effect.

Like Duel Disks and Duel Runners, Duel Gazers have a standard version (light grey with blue lens), but also has different design colors, and different versions can be adapted with glasses as seen with Flip. Nelson Andrews' Esper Sparrow mask can be connected with a Duel Gazer in a similar way as Flip's glasses.