The Wireless Mobile Phone Signal Booster is for people who are located in remote places, far away from the tower and have problems in communicating on their Cellular Phone because of poor signals. Also the Booster is very useful in cities, where in spite of full mobile signals on the mobile phone, there is a break in voice leading to call clarity problem. Simply plug the mobile phone signal booster into your office, home farmhouse, factory and you'll be astonished with the huge gain in both the incoming reception and outgoing transmission levels as the signal booster goes to work!