Harmon Kardon Onyx Studio 4
The Onyx Studio 4 is a fantastic option for retail or outdoor applications because you can connect literally dozens more Onyx 4s via HK’s Connect app. It has two device connections, 8 hours of playtime, a built-in microphone, and echo and noise cancellation for crystal-clear conferencing. And right now it’s marked down 70 percent from $450.
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