4 Trigger Mobile Game Controller with Cooling Fan
4 triggers. 6 fingers. 1 fan. It's mobile game on with this controller accessory for iOS and Android smartphones.
The slide-on controller was designed for use with the likes of Fortnite, PUBG, Call of Duty Mobile, and Knives Out. Its 6-finger operation enables gameplay with the entirety of your "claw hand," so you can aim, shoot, and move left / right at the same time. The controller also allows of user-defined button functions (e.g., open backpack, aim, jump, shoot, fall down, etc.)
To avoid phone battery overheating, the controller has a built-in cooling fan at the back, which its maker claims operates silently. As for the quad of "triggers," those are the 180-degree flip-down latches at the top of the controller that secure your phone in place.
The controller also has port cutouts on its side so you can charge your phone while playing.