Sennheiser HD 350BT Bluetooth HeadsetThese Sennheiser Bluetooth headphones will help motivate you to complete various tasks with ease. They give you an engaging sound experience with their deep bass feature. Thanks to their long-lasting battery life and fast USB-C charging, you can enjoy using them for a long time without worrying about running out of charge.➦ Engaging SoundThese headphones ensure that you get to enjoy an immersive sound experience, thanks to the deep dynamic bass feature. Thanks to the Bluetooth 5.0 feature and high-quality wireless codecs - smooth transmission is achieved.➦ Long-lasting BatteryThese compact headphones offer long-lasting use of up to 30 hours so that nothing stops you from listening to your favourite tunes. They also offer USB-C fast charging so that you can go back to your music as soon as possible. Designed with good-quality materials, these headphones offer durable use.➦ Voice AssistantThanks to the dedicated Voice Assistant button, you can instantly use the Siri or Google Assistant feature. The easy-access touch buttons on the earcups help you control your music and calls with ease.➦ Smart Control AppYou can use the Sennheiser Smart Control App to personalize, control, and update and configure these headphones.We only sell 100% Original True Sound, Top-quality Sennheiser Genuine Products.Specifications⚡GeneralModel Name: HD 350BTColor: BlackHeadphone Type: On the EarInline Remote: YesSales Package: 1 Earphone, 4 Set Earbuds (XS/S/M/L), USB Type-C Charging Cable, Quick Start GuideConnectivity: BluetoothFoldable/Collapsible: YesDeep Bass: NoWith Microphone: Yes⚡Product DetailsFrequency response (Microphone): 80 Hz to 6,000 Hz (-3 dB)THD, total harmonic distortion: < 0.3 % (1 kHz, 100 dB)Transducer principle: Dynamic, closedPick-up pattern: Dual BeamformingTransducer principle (Microphone): MEMSBluetooth Version: 5.0Frequency response: 18 Hz to 22,000 Hz (-10 dB)Modulation scheme: GFSK, π/4 DQPSK, 8DPSKBattery Specification: Built-in Lithium-Polymer rechargeable battery: 3.7 V ⎓, 300mAhCharging Current: 320 mA max.App support: EQ and updates via Sennheiser Smart ControlAudio codec: SBC, AAC, AptX™, AptX™ Low LatencySupported Profiles: HSP, HFP, AVRCP, A2DPCharging time: Approx. 2 hoursCharging voltage: 5 V, DCEar coupling: Around EarOperating time: 30 hours music playback via BluetoothSound pressure level (SPL): 108 dB (1 kHz/0 dBFS)Transmission frequency: 2,402 MHz to 2,480 MHzWeight: Approx. 238 gBattery Type: Lithium-ionWidth: 195 mmHeight: 10 mmDepth: 232 mm