YAMAHA Unified Communications Microphone Speaker System Black (Wired Model) YVC-331

External Interface: USB 2.0 Full Speed, EXT IN/OUT (stereo mini) *Bluetooth and NFC not supported Microphone: 3 x Unidirectional, Sound Pickup: Standard: Recommended 1.5m/Max 3m, SoundCap: 1m, Speaker: 1 x Full-range, Volume: Instantaneous Max 91dB (0.5m), Frequency Response: 190Hz - 20,000Hz, Signal Processing: Adaptive Echo Canceller, Noise Reduction, Automatic Microphone Tracking, Auto Gain Control, Reverberation Suppression, SoundCap Power supply: USB bus power: 5V/500mA, AC power supply: AC100V (50/60Hz) *AC adapter sold separately. Supported OS: Windows 10 (32-bit/64-bit), macOS 12, macOS 11, macOS 10.15, USB: USB 2.0 or later Warranty period: 2 years