Gamesir's X2 Bluetooth controller can help turn your Android phone into a Switch-like emulation machine. It functions with iPhones too, but the Apple's 'walled garden' stance limits usefulness.
GameSir X2 Mobile Gaming Controller review
GameSir X2 Bluetooth version is a universal mobile gaming controller which is compatible with both Android and iOS mobile devices. This is another smart game controller which is perfect for cloud gaming, and iOS users will be able to enjoy Apple Arcade and MFi games. It can be easily attached to the phone.
GameSir X2 Mobile Gaming Controller Bluetooth Version
No input delay: GameSir X2 is a controller with wired connection by Type-C port directly, which greatly reduces the time required for the device's
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