MOMENTUM Sport is the ultimate gear for every step of your training journey. Enjoy a new class of sports earbuds, which provide unrivalled sports sound with a secure fit, adaptive ANC, and advanced performance tracking sensors like heart rate and body temperature measurement that let you optimize your training. Key Features Integrated performance tracking sensors Unrivalled Sennheiser Sports Sound Energize your performance with high-quality sports sound with more impactful bass. Adaptive ANC Stay in the zone without distractions even in noisy gyms or busy outdoor spaces. Sport ́s ecosystem connectivity Compatible via Bluetooth Powered by POLAR Full Polar integration plus free access to Polar Flow for seamless tracking of your key metrics. Secure, multi-sports fit Interchangeable ear fins and ear tips allow for a secure custom fit over long-wearing sessions. Semi-open design for greater acoustic relief Acoustic relief channel allows airflow to improve wearing comfort, by reducing body-borne noise, and improving natural awareness. Transparency Mode Hear your surroundings with a sports-optimized shielded mic system to cut wind noise when on the move. Durable, shock-resistant, and sweat and water-resistant Exceptional IP55 resistance rating combines with a unique acoustic design to shut out moisture without compromising sound quality. Effortless Tap Controls interaction No fiddly controls on the move, MOMENTUM Sport can sense taps on the area around your ears, so you stay in the zone.