Sennheiser SD Office ML Headset - Mono - Wireless - DECT - 590 ft - 150 Hz - 6.80 kHz - Over-the-ear, Over-the-head - Monaural - Supra-aural - Noise Cancelling Microphone - Mono - Wireless - DECT - 590 ft - 150 Hz - 6.80 kHz - Over-the-ear, Over-the-head
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