Sennheiser HD 450BT Wireless Headphones Head-band Music Bluetooth Black

Weight: 238 g | Operating temperature (T-T): 0 - 40 °C | Frequency band: 2.402 - 2.480 GHz | Sound pressure level (max): 108 dB | Detachable cable: Yes | Bluetooth profiles: A2DP | Noise canceling type: Active | Control unit type: On-ear control unit | Bluetooth: Yes | Impedance: 35 Ω | Wearing style: Head-band | Recommended usage: Calls/Music | USB connector: USB Type-C | USB connectivity: Yes | Driver unit: 3.2 cm | Safety sheet: Yes | Cables included: USB Type-C to USB Type-A | MEMS (Micro-Electro-Mechanical System) microphone: Yes | Connectivity technology: Wired & Wireless | Operating keys: Answer/end call | Battery type: Built-in battery | Bluetooth version: 5.0 | Microphone frequency: 80 - 6000 Hz | Operating keys: Volume + | Operating keys: Bluetooth pairing | Carrying case: Yes | Headphone frequency: 18 - 22000 Hz | Foldable: Yes | Bluetooth profiles: AVRCP | Bluetooth profiles: SBC | Number of microphones: 2 | Bluetooth profiles: HFP | Bluetooth profiles: HSP | On/off switch: Yes | Continuous audio playback time: 30 h | Battery voltage: 3.7 V | LED indicators: Yes | Battery operated: Yes | Quick start guide: Yes | Battery recharge time: 2 h | Cable colour: Black | Operating keys: Volume - | Microphone direction type: Omnidirectional | Driver type: Dynamic | Charging source: USB | 2.5 mm connector: Yes | Product colour: Black | Ear coupling: Circumaural | Cables included: Audio (2.5mm to 3.5mm) | Battery capacity: 600 mAh | Control type: Buttons | Total Harmonic Distortion (THD): 0.3% | Volume control: Button | Product type: Headset | Bluetooth profiles: AAC | Battery technology: Lithium Polymer (LiPo) | Microphone type: Built-in | Headset type: Binaural | Storage temperature (T-T): -20 - 60 °C | Noise canceling: Yes