I put the antenna on the very top of my roof with it verticle ran the cable to my computer room and my phone got all 5 bars in the computer room pretty much right next to the unit. Go about 10 feet and the signal goes back down to 1 to 2 to roaming, this is line of sight of the base unit. The manual states that it will cover 2500sq ft, there is no way it would or could cover that much area let alone 10ft. The manual states that the base unit is only a .25watt and talking to a communication buisness that sells similar units that are more high end and are up to 3watts those won't even cover that much area. If you want any mobility to roam around the house and get good signal don't waste your money on this, if you are stationary with your phone or tether it to your desktop then this would work for you. One thing postitve I can say the customer service was right on the phone with me and very friendly.