GameSir X5s Mobile Controller (White)GameSir X5s Mobile Controller (White) The GameSir X5s is a modern mobile controller designed for comfortable gaming on Android, iOS, Nintendo Switch, Switch 2, and PCs. With Bluetooth, USB C wired, and 2. 4 GHz wireless connectivity, you can use it in the way that best suits your device and playstyle. The extendable design supports devices ranging from 105 to 213 mm in length, so the controller works with most modern smartphones and smaller tablets.