polk audio am4220-a hinge wireless (blue)

Bluetooth wireless technology aptX and AAC delivers high quality sound from your smartphone, tablet, or computer; Near Field Communication (NFC) allows for ease and convenience of simply touching your Bluetooth device to pair and connect | 12 hour rechargeable Lithium ion battery | Built in microphone lets you enjoy conversations via your compatible cell phone; SoundClear Technology emphasizes voice quality during a phone call whether you're in a quiet room or a noisy vehicle | Included single detachable cable with inline control; The cable enables you to use your headphones when Bluetooth isn't available, or the headphone's battery has no charge | Comfortable ergonomically designed headband and pivoting ear cups; The headband uses a lightweight, yet rugged aluminium hinge that enables the headphones to fold down into a compact, easy travel size

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