
Purchased for a vocal machine I bought from Costco. The microphones work well, but when not in use a hiss is audible. Between songs it is better to put the microphone on standby. I don't know what it is and how to fix it. The sound quality is better than wired microphones. First I bought another brand and it was the worst quality microphone. I didn't have the same issues that other reviewers claim, so at least it does. The microphone is good for the price. Each microphone requires 2.9 volts if you have more than one.

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