Sennheiser’s HD 250BT deliver a thrilling audio experience with dynamic bass, state-of-the-art Bluetooth connectivity and durable design. Thanks to a 25-hours battery life and advanced codec support, Sennheiser’s higher quality audio experience can be enjoyed anytime and anywhere. Our famed transducer technology as well as support for high-quality codecs such as aptX™ and AAC ensure remarkable audio quality with dynamic bass for a DJ-inspired sound. Rock-solid Bluetooth 5.0 connectivity assures a better listening experience, while aptX™ Low Latency keeps audio perfectly synchronized with onscreen action when enjoying video. Whether listening to music, watching videos or taking calls via the built-in microphone, the HD 250BT can keep pace with the busiest lifestyles thanks to its outstanding 25-hours battery. Wearing style Headband Transducer principle (Microphone) ECM Sound pressure level (SPL) 110 dB (1 kHz/0 dBFS) THD, total harmonic distortion < 0.3 % (1 kHz, 100 dB SPL) Ear coupling Supra-aural Transducer principle dynamic, closed-back Pick-up pattern Omni-directional microphone Single mic Operating time 25 hrs (music playback via SBC) with headphones' rechargeable battery Power supply built-in rechargeable lithium-polymer battery: 3.7 V ⎓, 190 mAh USB charging: 5 V ⎓, 100 mA max. Operating relative humidity Operation: 10 to 80%, non condensing Storage: 10 to 90% Temperature Range operation: 0°C to +40°C charging: +10°C to +40°C storage: –20°C to +60 °C Charging time up to 3 hrs App support Sennheiser Smart Control App for iOS™ and Android™ Frequency response 20 Hz to 22,000 Hz (-10 dB) Frequency response (Microphone) 100 Hz to 10,000 Hz Weight approx. 125g
