Polk Audio AM4219-A Hinge Wireless (Black)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 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. </span></li><li><span class="a-list-item"> 12 hour rechargeable Lithium-ion battery. </span></li><li><span class="a-list-item"> 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. </span></li><li><span class="a-list-item"> 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. </span></li><li><span class="a-list-item"> 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. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41rpXxdRcEL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31khjGG3akL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/419XqVRkXFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ArrwpvEzL.jpg" noproxy>