OnePlus has launched a surprise gaming accessory compatible with both Android smartphones and iPhones. The new Gaming Triggers have been designed to give a more tactile experience, and an advantage, when playing Battle Royale-style multiplayer mobile games.
https://www.notebookcheck.net/New-OnePlus-Gaming-Triggers-aim-to-give-Battle-Royale-gamers-a-edge.533710.0.html
These type of device are stupid and almost never work like advertised , doesn't help the fact they look retarded.