Rev 11:3 And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.
Rev 11:4 These are the two olive trees, and the two candlesticks standing before the God of the earth.
Some say these are more than two people. Some seperate olive trees and two candlesticks saying they are the church (two candlesticks) and Israel (two olive trees)
Verse 10 makes it clear that these two witnesses, two olive trees, two candle sticks are two pophets.
Rev_11:10 And they that dwell upon the earth shall rejoice over them, and make merry, and shall send gifts one to another; because these two prophets tormented them that dwelt on the earth.