Provides up to 500 sq ft of signal coverage. The Cellphone-Mate SureCall™ CM2000-45KIT provides completely wireless boosting of signals for 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, booster, cable, inside right angle antenna and outside antenna.