The ultimate equipment for your workout - experience fantastic Sennheiser sound with heart rate and body temperature monitoring. Push yourself or find your flow with adaptive active noise cancellation and a powerful transducer. Features: • Training data: Measure your heart rate and body temperature with the built-in in-ear sensors for optimal workout performance. • Sennheiser Sport Sound: Powered by a 10 mm transducer, the sound tuning adapted for Sport delivers powerful bass for a dynamic listening experience. • Adaptive ANC: Active noise cancellation with excellent wind noise reduction automatically adjusts to ambient levels for optimal performance in any situation, indoors or outdoors. • Connection to the sports world: Compatible via Bluetooth with sports watches, apps and fitness equipment for heart rate monitoring, as well as access to the Polar Flow app for body temperature measurement. • Powered by Polar: Full Polar integration and free access to Polar Flow for seamless tracking of your training data. • Customizable Fit: The interchangeable ear fins and ear adapters allow for a secure, custom fit for a variety of sports with lasting comfort. • Shockproof, Dust & Sweat Resistant: The sturdy design with IP55 protection protects against moisture without compromising sound quality. • Semi-Open Acoustic Design: The acoustic flow channel allows for optimal airflow to increase wearing comfort, reduce structure-borne noise, and improve natural perception. • Transparency Mode: Hear your surroundings with a sport-optimized, shielded microphone system that reduces wind noise when you're out and about - ideal for outdoor training or with a group. • Quick Tap Control: A tap near the earbud controls the headphones - ideal for use between two workouts or in the cold when the earbuds are covered. What's in the box? 1 MOMENTUM Sport Wireless 3 In-ear fin set (S/M/L) 3 Ear tip sets (N/S/M/L) 1 USB-C charging cable 1 Charging case with lanyard 1 Quick guide and user manual Specifications: Wearing style: True wireless stereo earphones Ear Coupling: Ear canal Connectivity: Bluetooth 5.2 compliant, class 1, 16mW (max), RF Range 40m – line of sight Transmission frequency / modulation: 2,402 MHz to 2,480 MHz; GFSK, π/4 DQPSK / 8DPSK Supported Profiles: A2DP, AVRCP, HFP Supported codecs: SBC, AAC, aptX™, aptX adaptive™ Speaker principle: Dynamic Speaker type/size: dynamic, 10mm diameter Speaker frequency range: 15 Hz to 18 kHz Speaker sensitivity: 110 dB SPL (1 kHz / 0 dBFS) Speaker THD: Active Noise Cancellation: Hybrid Adaptive ANC Mic principle: MEMS Mic frequency range: 100 Hz to 10 kHz Mic pick-up pattern: 3 mics per earbud, beamforming for noise reduction Battery lifespan; Up to 5.5 hrs music playtime with earbuds; Up to 24 hrs overall music playtime with charging case (test condition: iPhone, mid volume level 85 dB) Charging time: Approx. 1.5 hrs for fully charged; After 10 min charging 45mins music playtime Remark: Ambient temperatures >30°C and Qi wireless charging leads to extended charging times Battery type: Built-in Lithium-Ion rechargeable batteries; Left/right earbud: 72 (MC1254) / 75 mAh(CL1254); Charging case: 850-950 mAh Power Supply: 5 V⎓, 1000 mA max; USB charging via USB-C socket at charging case; Qi Wireless charging Magnetic strength field Earbuds: 1.86 mT; Charging case: 250 mT Weather resistance: Earbuds: IPx5; Charging case: IPx4 Product Specification: 91.0 g (both earbuds and charging case) 6.4 g (single earbud N ear fin and M ear tip) 78.4 g (charging case) 23.3 x 20.9 x 26.1 mm (earbuds) 67.7 x 64.8 x 30.0 mm (charging case) Operating condition Operating temp: 0 to +45°C, Charging temp: 5 to +35°C; Rel. humidity 10 to 80%, non-condensing Storage condition: Temp: –20 to +60°C; Rel. humidity 10 to 90% App support: Sennheiser Smart Control app for iOS™ and Android™