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

External interface: USB 2.0 Full Speed, EXT IN/OUT (stereo mini) *Bluetooth/NFC not supported Microphone: Unidirectional x 3, Sound collection: Standard: Recommended 1.5m/Maximum 3m, SoundCap: 1m, Speaker: Full range x 1, Volume: Momentary maximum 91dB (0.5m), Frequency band: 190Hz to 20,000Hz, Signal Processing Adaptive echo canceller, noise reduction, automatic microphone tracking, automatic gain control, dereverberation, SoundCap Power supply USB bus power drive: 5V/500mA, AC power drive: AC100V (50/60Hz) *AC adapter is sold separately. Compatible OS: Windows 10 (32bit/64bit), macOS 12, macOS 11, macOS 10.15, USB: USB 2.0 or later Warranty period: 2 years