Get the next generation MOMENTUM 4 Wireless that is inspired by music. Sennheiser's Signature SoundDiscover best-in-class sound with our audiophile-inspired accoustic system. Superior SoundEnjoy your favorite music like never before with our audiophile-inspired 42mm transducer system that delivers brilliant dynamics, clarity and musicality. Your wayMake the sound perfect for you using the built-in EQ, presets, sound modes, and Sound Personalization feature, which tailors the audio to your individual hearing. New Adaptive Noise Cancellation and Transparency ModeGo from total immersion to situational awareness with just a touch. Full immersionOur next generation Adaptive Noise Cancellation automatically adapts to ambient noise so you can stay immersed and hear every detail, even in noisy environments. Situational awarenessNeed to hear an announcement on the train or a question from your colleague? Just activate the versatile Transparency Mode at a touch to hear outside sounds without removing your headphones. Premium look & feelEnjoy exceptional comfort and streamlined style. Premium comfortThe M4’s lightweight design features a padded headband and deep, yet soft, cushioned earpads to ensure exceptional and long-lasting wearing comfort. Perfect fitMeanwhile, the low-friction hinge mechanism easily adjusts to give you a great fit without placing excess pressure on your head. Smart & easyLet nothing stand in the way of your listening pleasure. Up to 60-hour battery lifeKeep on listening while you fly around the globe, with up to 60-hour battery life and fast charging capability that provides a further 6 hours listening in just 10 minutes. Never miss a beatSmart Pause halts playback when the headphones are taken off and automatically resumes when they’re back on your ears so you’ll never miss a beat, while Auto On/Off rapidly powers up the headset when it’s picked up and shuts down to save energy when not in use. Features: Sennheiser Signature Sound Customized sound Adaptive Noise Cancellation Transparency Mode Premium Comfort Top-Tier Battery Life Crystal-clear Calls Specifications: Wearing style: Headband stereo headphones Ear Coupling: Around-the-ear, circum-aural Connectivity: Bluetooth 5.2 compliant, class 1, 10 mW (max) Transmission frequency: 2,402 MHz to 2,480 MHz; GFSK, π/4 DQPSK / 8 DPSK Supported Profiles: A2DP, AVRCP, HFP Codecs: SBC, AAC, aptX™, aptX adaptive™ Speaker Type: Dynamic Transducer principle: 42mm diameter Speaker frequency range: 6 Hz to 22 kHz Speaker sensitivity: 106 dB SPL (1 kHz / 0 dB FS) Total harmonic distortion (THD): Speaker: <0,3% (1 kHz / 100 dBSPL) Impedance: Speaker: Active 470 ohms / Passive 60 ohms Active Noise Cancellation: Hybrid Adaptive ANC Microphone principle: MEMS Frequency response (microphone): 50 Hz to 10 kHz Microphone pick-up pattern: 2 mics per side, beamforming for noise reduction Battery time: Up to 60 hrs music playtime via Bluetooth and with ANC (test condition: iPhone, mid volume level) Charging time: Approx. 2 hrs for full charge; 5 min charging for up to 4 hrs playtime; Remark: Ambient temperatures >30°C may lead to extended charging times Battery type: Built-in Lithium-Ion rechargeable batteries 700 mAh Power Supply: 5 V⎓, 800 mA max, USB charging via USB-C socket