Poly Voyager Focus 2-M ANC Stereo Bluetooth Business Headset (Stand+USB Dongle) - Microsoft Teams Certified - USB Bluetooth Dongle - Discrete Noise Cancelling Boom Microphone - Frequency: Up to 7kHz (Wideband), 20Hz ~ 20kHz (Multimedia) - Bandwidth: Wideband - Connectivity: micro USB, Bluetooth 5.1 - Battery Life: Up to 19 Hours Talk Time (ANC Off), 40 Hours Listening Time (ANC Off) - Includes Charging Stand - 213727-02 - 2 Years Limited Warranty