A high-quality audio experience, consistently balanced at any volume, thanks to Bose active EQ. Connectivity Technology: Wireless, Wireless convenience, with easy Bluetooth and NFC pairing aided by voice prompts, Exclusive Stay Hear+ tips keep the headphones comfortably in place during workouts, Sweat and weather resistance for reliability while exercising, Up to 6 hours battery life per charge. Please refer the User Guide before use.