NOTE; This model requires 15' separation between the outside and inside antennas to properly work. The CM2000 -40 V3.0 is the better choice if you don't have this possibility. Provides the strongest boost to indoor mobile coverage as possible. The Cellphone-Mate SureCall™ CM2000-45 V3.0 provides completely wireless boosting in vehicles, RVs, trailers and to multiple users simultaneously. It supports all cellphone handsets and service providers in the PCS or Cellular frequency bands, and is perfect for use in office enterprises, large vehicles (ships, trains, buses), or homes with multiple users. A sophisticated Protection circuit also prevents damage to the amplifier due to interference or improper installation. With a SureCall™ Amplifier doing all the long-range work, the battery on your cellphone drains slower, thereby increasing talk time. The 6V design runs safer, cooler and more efficient. Finally, with proper use of the SureCall™ CM2000-WL, dangerous hot spots are removed a safe distance from the user's body. The SureCall™ CM2000-WL 45dB is designed to boost multiple users in a small area. Therefore, it is best used in the following applications:Truck/RV/Boat/Trailer/Single Room. Comes with everything needed, car charger, home charger, booster, cable, inside right angle antenna. The outside magnetic mount 3db antenna is optional. High output booster.