Poly Sync 20 Microsoft Teams Certified Speakerphone USB-C/A Adapter Battery life: Up to 20 hours (talk time) Battery: Rechargeable Li-ion Button User Controls: Power on/off Bluetooth® pairing Touch User Controls: Call/answer end Mute Volume +/- Programmable function button Microphone Type:Three-microphone steerable array: Microphone Bandwidth: 100 Hz to 7.3 kHz Speaker size: 40 mm Speaker bandwidth: 80 Hz to 20 kHz Wireless Range: Up to 30 m Connection Type: Wireless: Bluetooth®, USB Type-C® USB Type-C®/A adapter Cable length: 28.1 in Charge Time:<4 hours Color: Black Compatibility: Compatible with PCs via USB Type-A cable and smartphones via Bluetooth®? Compatible operating systems: Windows 11, Windows 10, macOS Minimum system requirements: Bluetooth®, USB Type-C® port Dimensions (W X D X H): 1.3 x 3.7 x 7.2 in Weight: 0.79 lb Warranty: Poly standard two-year limited warranty What's in the box: Quick start guide Warranty card Product notice Wired Speakerphone Lanyard Carrying pouch USB Type-A adapter