We have a studio and I was getting a buzzing sound when doing recordings of Zoom guest bc I had to max out the volume in order for the host to hear them. This little device allowed me to not have to max out the volume, which then removed the buzzing sound. I've only used it on battery power once and it worked great. I usually just leave it plugged into the computer with the USB cable that it came with. Works great for my needs.
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