The Koss BT539i Wireless Bluetooth® headphones have the natural fitting, iconic "D-profile" earcup, first featured on the ergonomically designed Koss Pro4AAA and now available on many Koss headphones. The D-profile mimics the shape of the ear, creating an excellent seal for the most consistent sound reproduction.
- Full size, Wireless Bluetooth® Over-Ear Headphones
- Bluetooth® 4.0 Technology
- Built-in rechargeable lithium-ion battery
- Up to 12 hours of playtime (at moderate volume) on one charge
- Up to 40 hours of standby time on one charge
- Detachable cord
- Fold-flat for travel
- Available in dark grey or white
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