The noise-cancelling Poly Savi 8200 series headset is ideal for use in noisy workspaces. Other features: Monoaural DECT headset for PCs/notebooks, mobile phones and desk phones 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 Microphone wideband frequency response: 100 Hz - 6.8 kHz Headset controls: Answer/end calls, mute, volume control, on/off switch 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.