Poly Sync 20+ amp; Sync 20 SPECIFICATIONS - Connects to PC via USB-A or USB-C or wirelessly via BT600 bluetooth adapter (only Sync 20+ varian); smartphone via Bluetooth - Compatible with Windows or Mac OS - Support MS Team User Interface features: - Call/answer end - Mute - Volume +/- - Programmable function button - Push button user controls for power on/off, Bluetooth pairing - Highly visible status light bar - MS Teams button - Integrated USB cable - One USB-A port for smartphone charging Audio Features - Three microphone steerable array - Microphone pickup range up to 7ft/ 2 M - Microphone frequenculy response 100 Hz to 6.7 kHz - Full duplex audio - Noise amp; echo reduction - Loudspeaker 1 x 40 mm high performance music speaker - Loudspeaker frequency response 80 Hz to 20 kHz - Bass reflex with dual passive radiators Battery - Battery type Lithium-ion - Battery capacity 3200 mAh - Talk time up to 20 hours - Charge time 4 hours Dimensions - 34 x 95 x 182 mm Weight - 360 gram Cable length - 715 mm Environmental - IP64 dust and water resistant Accesories (Included) - Carry case - Lanyard - BT600 USB Bluetooth adapter (varian Sync 20+)