The SignalBoostTM Dual Band 800/1900 MHz Cellular Amplifier Kit is a single-user solution that boosts signal for a cell phone in the hands-free cradle. Increase your safety while driving and improve your cellular signal with Wilson"s new Cell Phone Cradle Plus. This plug-and-play kit amplifies the cellular signal of every U.S. cellular provider (Except iDEN/Nextel) and supports 3G data technologies such as HSDPA, EVDO and EDGE. The SignalBoost amplifier features up to 3 watts maximum output power. Power Control Logic ensures maximum output power is within cellular standards and protects cell sites from harmful interference. The SignalBoost kit Includes a 3 Watt amplifier, a Hands Free Cradle with built-in antenna, and cigarette lighter power supply. Call Wilson"s fully staffed Tech Department for questions or help at 866-294-1660. The use of radio distribution equipment that enhances, extends or amplifies a wireless signal may be prohibited without the consent of the wireless carrier upon whose network such equipment will be used. You should consult with your carrier before purchasing such equipment to use with that carrier’s service.