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

Storage temperature (T-T): -20 - 60 °C Operating temperature (T-T): 0 - 40 °C Weight: 238 g LED indicators: Yes Product colour: Black Recommended usage: Calls/Music Volume control: Button Operating keys: Answer/end call Foldable: Yes Control unit type: On-ear control unit Control type: Buttons Headset type: Binaural Wearing style: Head-band Cable colour: Black Sound pressure level (max): 108 dB Product type: Headset Detachable cable: Yes On/off switch: Yes Quick start guide: Yes Cables included: Audio (2.5mm to 3.5mm) Carrying case: Yes Safety sheet: Yes Bluetooth: Yes Connectivity technology: Wired & Wireless Frequency band: 2.402 - 2.480 GHz USB connectivity: Yes Bluetooth profiles: HSP USB connector: USB Type-C Bluetooth version: 5.0 Battery voltage: 3.7 V Battery type: Built-in battery Battery recharge time: 2 h Battery technology: Lithium Polymer (LiPo) Battery capacity: 600 mAh Charging source: USB Battery operated: Yes Continuous audio playback time: 30 h 2.5 mm connector: Yes Microphone type: Built-in Microphone direction type: Omnidirectional