Compatibility Compatible with PCs via USB Type-A cable and smartphones via Bluetooth®️ Color Silver Sensitivity (microphone) -42 +/-3 dB Signal-to-noise ratio >55 dB Charge time <4 hours Charging type Cable Battery life Up to 20 hours (talk time) Battery type Rechargeable Li-ion Impedance 4 ohms Cable length 715 mm Bluetooth version 5.1 Supported bluetooth profiles A2DP; AVRCP; HFP; HSP; BLE Paired devices Up to 10 Nominal sound pressure level 86 dB SPL Touch user controls Call/answer end; Mute; Volume +/-; Programmable function button; Microsoft Teams Button user controls Power on/off; Bluetooth® pairing Sensitivity (speaker) 82 dB (1 W/1 m) Number of microphones 3 Microphone type Three-microphone steerable array Speaker bandwidth 80 Hz to 20 kHz Microphone bandwidth 100 Hz to 6.7 kHz Compatible Operating Systems Windows 11; Windows 10; macOS