What is f in Russian?

What is the Cyrillic letter 'f'?

The Cyrillic letter Ef or Fe (Ф ф; Ф ф) is used to denote the voiceless labiodental fricative sound /f/, similar to how the letter ⟨f⟩ is pronounced in words like fill, flee, or fall. In terms of romanization, Ef is represented as ⟨f⟩.