This will help in providing a more specific guide.
: "RT22" is a common model for Retevis Walkie Talkies , and "f96r" could refer to a frequency range or a specific firmware revision. tr6p22rt.f96r.2.rar
: Use a tool like WinRAR or 7-Zip to open the archive. Look for a .txt or .nfo file inside, which often contains the "guide" or installation instructions you are looking for. This will help in providing a more specific guide