The Wilson Mobile Wireless 3 Watt Cellular Amplifier has been carefully engineered to significantly improve the performance of your cell phone or wireless data card in mobile applications for any U.S. Cellular Provider (Except iDEN/Nextel). Together with an outside Antenna, the Amplifier's State-of-the-art technology is designed to increase your cellular signal up to 10 times, reduce disconnects and dropouts and increase data communication rates needed for 3G technologies. This unit provides a wireless communication to any cell phone and/or data card within the vehicle and will work for multiple cell phones or data cards simultaneously. The Dual Band Mobile Wireless 824-894/1850-1990 MHz Smart Technology Amplifier kit comes with everything you need, including a 12-Inch Magnet mount antenna our 3 Watt Amplifier, internal antenna, & cigarette lighter power source. Call Wilson's fully staffed Tech Department for questions or help at 866-294-1660. ..