For $7.50, this is a great $30 value.

does the job well, full spectrum and has great recording value

Great value mic, personally have a full set of these for on-the-air backups of the condenser mics we upgraded to.

Very good value for the low price.

Amazing value

On the plus side, it does convert sound waves into electrical signals and will function if used with the supplied cable, from 6 feet away it looks like a pretty good microphone, and the price makes it a decent value.

I can't say how the microphone actually works as we didn't plug it in or anything, but for $3.99 I think this is a steal if you're looking for a cheap prop for a play, photoshoot, etc.