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

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