Koss BT539i Headphones

The Koss BT539i Wireless Bluetooth® Over-Ear Headphones pack powerful wireless sound into a portable, fold-flat unit.

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.

Features 

• Full size, Wireless Bluetooth® Over-Ear Headphones
• Bluetooth® 4.0 Technology
• D-Profile
• 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