The Sure Call Fusion2Go 3. 0 NMO Cell Phone Signal Booster Kit increases cellular coverage for multiple users inside a vehicle for all North American carriers' voice, text and 4G LTE data signals, making this booster kit the go-to solution for fleets, drivers and passengers who travel in tough-to-reach areas. The Fusion2Go 3. 0 uses a bi-directional amplifier system to capture, enhance and rebroadcast a stronger and more reliable cell signal inside your vehicle. Simply plug in the power supply, position the magnetic antenna on the roof and Fusion2Go 3. 0 will keep you connected. This kit includes exterior NMO antenna with 3/4 in. mounting base, interior patch antenna, cables and 12-volt hardwire power supply. The permanent nature of the NMO antenna requires the help of a professional installer, as the installer will need to drill a small 3/4 in. hole in the roof of the vehicle and run the antenna’s cable between the vehicle's exterior and ceiling headliner.