I bought two of these and found that both were incompatible when I shot them. Sometimes they work and sometimes they don't. Initially, both worked well, but after only a few months, I realized I didn't have a complete record, and some just didn't have it. The microphone is good because it picks up sounds from afar. However, it does not distinguish between voices and other noises there, so many of the recordings I received are not very usable due to a lot of background noise.
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