Our mobile signal booster is specially designed for the “blind zones” of offices, family rooms, factories, bars, supermarkets, underground parking garage,etc, where the signal is very poor, or in spite of full mobile signals on the mobile phone, there is a break in voice leading to call clarity problem. Simply place the mobile phone booster in such places, you'll be astonished with the huge gain in both the incoming reception and outgoing transmission levels as the mobile signal booster goes to work!