A stylish sunglasses that can connect to sulfur’s system and give vital information 

as a bonus action you can mark an enemy. The mark lasts as long as someone wearing the glasses has line of sight on it. invisibility breaks the mark. When a target is marked people wearing the glasses see a red outline around it and gain a +1 on attacks against it. Marking doesn’t benefit from any special senses you have like blindsight or true sight.

it also has a Communication system, it will cast message to any of the other glasses when needed.