Wilson Electronics Mini-Mobile Cell Phone Signal Booster for Car with Cradle and Ultra Slim Antenna - For Multiple Users Delivers 6X More Power Than A Normal Cellular Phone Does Not Require Physical Connection to Cellular Phone Or Cellular Pc Card Dual Band 800/1900 Mhz Greatly Increases Signal Range & Cellular Pc Card Performance No physical connection to your cell phone or data card Oscillation Detection and shutdown with auto reset Six times more powerful than your cell phone Automatic reset if overload occurs FCC and IC type accepted