The Dajjal will claim that he is God. He will perform mighty acts to convince people of his claim. But, every true believer, whether literate or illiterate, will be able to read the word kafir on his forehead, as stated by Prophet Muhammad (Sallallaahu Alayhi Wasallam). He (Sallallaahu Alayhi Wasallam) has also described his physical appearance as: short, fat, red-faced, bow-legged, with curly hair and one-eyed. One of his eyes is extinguished, and is neither protruding nor deep-seated, but resembles a floating grape. "If you are confused, know that your Lord is not one-eyed, and that no one will be able to see the Lord [in this world]."
The Dajjal will acquire assistance from devils: "He will say to a Bedouin: 'What do you think if I bring your father and mother back to life for you'? Will you bear witness that I am your Lord?' The Bedouin will say, 'Yes', so two devils will assume the appearance of his father and mother and will say: 'O son follow him, for he is your Lord.'" (ibn Majah, ibn Khuzaymah, and al-Hakim).
Animals and objects will execute his orders: "He will come to people and call them, and they will believe in him and answer his call. Upon his order, the sky will rain, and the Earth will produce crops. Their animals will graze on these crops, and will come back with their udders full of milk and their flanks stretched. Then he will go to other people and will call them, but they will reject his call. He will depart from them and then they will suffer great famine and will possess nothing in the form of wealth. He will pass by the wasteland and say: 'bring forth your treasures' and its treasures will follow him like swarms of bees." (Muslim).
Prophet Mohammad صلى الله عليه وسلم said: "Exactly at the time when the Imam of the Muslims will have stepped forward to lead them in the Morning Prayer, Jesus son of Mary عليه السلام shall descend upon them. The Imam will step back so that Jesus may step forward (to lead the Prayer), but Jesus عليه السلام, placing his hand between his two shoulders, will say, "No, you should lead, for the congregation has assembled to follow you. So, the Imam will lead the Prayer. After the salutation, Jesus will say, "Open the gate;" so the gate will be opened. Outside, there will be the Dajjal, along with 70,000 of the armed Jews. As soon as the Anti-Christ sees Jesus (upon whom be peace), he will start dissolving like salt in water, and will flee. Jesus will say, "I shall strike you a blow which will not allow you survive." And he (Jesus عليه السلام) will overtake him (Anti-Christ) at the eastern gate of Lud (a city 13 miles east of Tel Aviv, Israel), and Allah will cause the Jews to be defeated.... And the Earth will be so filled with the Muslims as a vessel is filled with water. The entire world shall recite and follow one and the same Kalimah (the testimony of Islam: There is no god, but Allah. Mohammad is a Messenger of Allah) and none shall be worshipped except Allah." (Ibn Majah).
http://www.discoveringislam.org/return_of_jesus.htm