GRID PARABOLIC ADVANTAGE - Using Griddy, our Ultra-High Gain Grid Parabolic Antenna along with the strongest booster on the market will give you the best level of improvement possible from this device. LINE OF SIGHT HIGHLY RECOMMENDED - Our Grid Parabolic Antenna is ultra high gain and works best if you have line of sight to the tower to making aiming simpler. 2X DOME/PANEL ANTENNA KIT: This version of the Cel-Fi GO X cell signal booster for AT&T, Verizon or T-Mobile includes 2x indoor dome antennas, 2x indoor panel antenna, and a 2-way signal splitter. You can use any two antennas and discard the others. 100 DB SINGLE-CARRIER BOOSTER ADVANTAGE: The GO X is the only 100dB cellular signal booster. The GO X only amplifies one cell carrier at a time, but boosts signal by 40 dB more than other boosters (10000x improvement!). Gain is a measure of amplification – more gain means faster data rates, a larger coverage area, and better cell signal. FASTEST DATA RATES: Slow data rates are the excruciating symptom of weak signal. The Cel-Fi GO X AT&T, T-Mobile, and Verizon signal booster amplifies cell signal to bring you perfect coverage. The most powerful signal booster on the market is now paired with the strongest outdoor antenna on the market! Adding Griddy in addition to the GO X will give you the ability to improve your cell signal in areas where even the GO X with a standard antenna won't work effectively.