SolidRF SOHO 850MHz Single Band Cell Phone Signal Booster for Home and Office AT&T 2G/3G Verizon 3G US cellular 3G/4G &iexcl;&shy; Works on generations of 3G( AT&T/Verizon/US Cellular) Allows multiple mobile devices to be used simultaneously Greatly reduces dropped calls, extends signal range, and increases data rates High integration semiconductor circuits design, internal integration inside antenna easily install Reduces radiation and extends battery life up to 2 hours additional talk time in weak signal areas