beyerdynamic Phonum; speakerphone for conference calls via internet; Bluetooth technology for more freedom of movement; USB connection as a secondary interface; range up to 10 m; runtime of rechargeable battery < 12 hrs; audio codec: Low Complexity Subband Codec (SBC); display of operating status, microphone mode, battery state; operation via touch sensors; charging time roughly 3 hours; Li-Ion; Sound pressure level : 75 dB at 1 m/1 Wrms; frequency response: microphone: 150 Hz to 6.8 kHz, loudspeaker: 100 Hz to 14 kHz; audio algorithm: echo cancellation (AEC), noise cancelling (ANC); Bluetooth: BT4.2, class 2; supported profiles: HFP, A2DP (device is a hollow), SPP (Upload); dimensions (L x W x H): 136 x 136 x 63mm; weight: approx. 450 g; delivery including hardcase and USB-C cable (1m)
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