PRODUCT FEATURES: 8-H CALLS & BLUETOOTH V5.1: AFTERSHOKZ Openrun quick charge and long endurance provide music even during full Marathons. Dual noise-cancelling mics with Bluetooth V5.1 delivers an outstanding listening experience. BUD-FREE COMFORT: Perfect Christmas gift for exercising and working from home. Unlike traditional wireless earphones, bone-conduction headphones sit in front of your ears leaving them open. No worries about “hot” ears even running on the hottest days. Lightweight 26g makes them hardly noticeable. OPEN EAR SAFETY: Whether you are running, cycling, sprinting or hiking, OpenRun wireless sports headphones provide the safest way to listen to music or podcasts without blocking out your surroundings. IP67 WATERPROOF: As a pioneer of bone conduction technology, we work on safe sports and are the only sports headphones brand recommended by England Athletics. IP67 waterproof wireless headphones fully consider the outdoor environment during exercise, perfect for intense workouts. (Not suitable for swimming) SOUND EXPERIENCE & 2 YEAR EXPERIENCE: With advanced technology, OpenRun Bluetooth headphones bring you exceptional sound quality. The product comes with a 2-year warranty. SPECIFICATIONS: Brand: AFTERSHOKZ Bone conduction technology: 8th Continuous playtime: 8 hours Charge time: 1.5 hours Standby time: Up to 10 days Bluetooth versions: V5.1 Sweat resistance: IP67 Weight: 26g Charging: Magnetic Charging Microphone: Dual Noise-Cancelling Mic Warranty: 2-year WHAT'S INCLUDED: OpenRun Bone Conduction Sports Headphone Magnetic charging cable Carrying bag