Open-Ear Comfort - OpenRun's innovative design features a featherweight, wraparound frame and wireless, open-ear fit for comfortable, earbud-free listening. Includes Shokz headbandSafety & Connection - Stay aware and motivated through any workout with our 8th-generation bone conduction technology. OpenRun delivers quality audio while leaving your eardrums open to surroundings for ultimate safetyIP67 Waterproof Rated - Completely sweat and waterproof for workouts, fitness, and running. Moisture detection alert included for safe charging. (Not suitable for swimming)4. 8 Hours of Music & Calls - Enjoy eight continuous hours of music, calls, and podcasts with our Bluetooth headphones. OpenRun also features a 10-minute quick charge for up to 1.5 hours of battery life. (Quick Charge Version of Aftershokz Aeropex)Outstanding Sound Quality - Bone conduction technology uses vibrations to transmit sound through your cheekbone directly to your inner ear for a premium audio experience