Koss BT539iK Wireless Bluetooth Over-Ear Headphones with Microphone and Volume Control - Dark Grey
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<b>[Product Information]</b><br>
<ul>
<li>Full size, Wireless Bluetooth® Over-Ear Headphones</li>
<li>Bluetooth® 4.0 Technology</li>
<li>Built-in rechargeable lithium-ion battery, 12 hrs playtime, 40 hrs standby (at moderate levels)</li>
<li>Detachable cord</li>
<li>Fold flat for travel</li>
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