When comparing Hey Mic! vs Nikon ME-W1 Wireless Microphone Set, the Slant community recommends Hey Mic! for most people. In the question“What are the best bluetooth microphones (excluding headsets) for mobile devices?” Hey Mic! is ranked 4th while Nikon ME-W1 Wireless Microphone Set is ranked 6th.
Specs
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Pros
Pro Works with both iOS & Android
Pro Water resistant
Not actually waterproof, but somewhat water resistant. The rating is IPX5.
Pro External microphone can be used
This makes it possible to use a higher quality lavalier microphone or even a stereo microphone such as the suggested separate purchase of the ME-1 microphone from the same brand Nikon.
Pro Transmitter and reciever can record separate tracks
You can record just the audio from the transmitter or you can record audio from both transmitter and reciever units eg the guest and the interviewer.
Cons
Con Need to use 3rd party camera app.
Con Expensive
Con Hiss/noise issues
Users report noise issues that sound like a constant hiss of a fan blowing in the background.