We bought these a few weeks ago for use at a Caribbean resort. The resort was large, but it definitely wasn't even 1 mile wide. We wanted to use it to communicate instead of using our cell phones to save on roaming charges. We tried using them from the balcony of our hotel room to the courtyard (about 50 meters) and they worked fine. We tried to use them from the balcony to the gift shop (100 meters) and they stopped working. They stopped working outdoors with no obstacles at 100 meters. Needless to say, they were completely useless for the rest of the trip. Now they just take up storage space. I would not recommend them if you plan on using them for more than 50 yards a piece.
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