The world's first DECT headset with ANC Binaural DECT headset for PCs/notebooks, mobile phones and desk phones Music and media playback in DECT audio quality and hi-fi stereo Talk time: Up to 13 hours Standby time: Up to 50 hours Headset wireless range: 180 m (line of sight); 55 m (typical office environment) Battery capacity: 490 mAh Charging time: 3 hours DECT and Bluetooth v4.2 wireless technologies Noise cancelling microphone Active noise cancelling Microphone wideband frequency response: 100 Hz - 6.8 kHz Headset controls: Call answer/end, mute, volume +/-, ANC on/off, power on/off Certified for Skype for Business Calls can be answered/ended through the headset: manufacturer-specific Electronic Hook Switch (EHS) module required (sold separately). Please inform us of your phone model so that we can find the compatible EHS cable. Please note: We recommend using Poly Lens software with this product. This enables central management of video devices, headsets, phones and webcams. Other benefits: - Custom device settings - Always the latest firmware - Easy troubleshooting tool - Fast device integration - Dashboard layout with intelligent news feed