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

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