High-quality:Bluetooth high-speed connected, answering incoming calls, handsfree talking, superior compatibility, high fidelity stereo surround sound Adjustable headband:Makes it easy to take on the vacation or business trip or to store in your desk drawer for use at work Foldable portable design:The headphones offer not only sleek style with a slim profile but also an adjustable contoured headband, it allows you to get a great position on your head.