POLY Savi 7320 Stereo DECT 1880 1900 MHz Top Operating system installed___macOS Monterey 5 cm Audio Built in speaker(s) 5 cm Audio Built in speaker(s) Yes RMS rated power 4 W Performance Built in speaker(s) Yes RMS rated power 4 W Low Blue Light technology Yes Flicker free technology Yes Management features On Screen Display (OSD) Yes Number of OSD languages 9 On Screen Display (OSD) languages Czech Phantom Black Savi 7320 Stereo DECT 1880 1900 MHz Top Volume Product colour Black Headset type Binaural Recommended usage Calls Music Wearing style Head band Product type Headset Ports & interfaces Connectivity technology Wired Headphones Noise canceling Yes Headphone frequency 20 20000 Hz Ear coupling Supraaural Microphone Microphone frequency 100 6800 Hz Microphone type Boom Base station Base station colour Black Battery Standby time 52 h Talk time 13 h Battery capacity 500 mAh Battery technology Lithium Polymer (LiPo) Weight & dimensions Weight 160 g Packaging content Base station Yes