SoundLink® On-Ear Bluetooth® Headphones feature Proprietary Bose Active EQ and TriPort® technology, which give your music crisp, powerful sound. These headphones are designed to be lighter and more comfortable than comparable wireless stereo headphones, and use an advanced two-microphone system and adaptive audio adjustment to reject noise and wind during calls. You'll always be heard, loud and clear! The state-of-the-art user interface lets you control your music and calls right from your headphones. Helpful voice prompts keep you up to date on battery life, which devices you're connected to and caller ID. These headphones are precisely engineered with impact-resistant materials, glass-filled nylon and corrosion-resistant stainless steel. With soft ear cushions and an Alcantara® fabric headband, you can listen in comfort. The headphones charge easily with the included USB cable and give you the power to listen for up to 15 hours. You'll get 2 hours of play time with a quick 15-minute charge. SoundLink® headphones let you switch between two Bluetooth® devices, so you can watch a video while staying connected to your smartphone. And when you're done listening, the headphones fold smoothly for easy storage in their compact matching case.