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Title: Works great when installed correctly
Review: I installed one at work. The antenna is way up on the roof and the base is in the office. Now the office has an excellent signal on all carriers we use. The range seems to be larger than what is advertised. Using A = pi r squared, the range should be 28 feet. But we found an improved signal at more than 50 feet.The only thing difficult is routing a cable from the roof to the base. Everything else is extremely easy.BUT, as many have probably mentioned, you need a good signal at the antenna location. Our unit was donated by an employee who tried it at home unsuccessfully. His signal was spotty on the roof, so there's no surprise it didn't work. But for an office environment where there's a good signal outside and the building makes it spotty inside, this is an excellent solution.
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