Intel Unison lets you connect your PC and Phone, Check this guide to know to install Intel Unison on PC and Phone and pair both devices.

The ONEXPLAYER is one of the most powerful handheld gaming computers to date, with support for up to an Intel Core i7-1195G7 processor, 16GB of RAM, up to 2TB of storage and an 8.4 inch, 2560 x ...

To install SteamOS, double click the icon labeled "Wipe Device & Install SteamOS." You'll get a pop up warning you that this process will permanently delete everything on your device.