Revolabs 10-YVC300 Yamaha Yvc-300 Usb Microphone And Speaker System Additional Features: Portable, lightweight design optimized for small group conferencing USB, Bluetooth and audio in/out connection interfaces Calls placed simultaneously over multiple connection interfaces bridge into a single call Supports automatic pairing of NFC-enabled devices Conveniently powered by USB Perfect BYOD phone for use in unequipped conferencing spaces Microphone: 3 x Unidirectional microphones Speakerphone: Supported OS: Windows 10 (32/64-bit), Windows 8.1 (32/64-bit), Windows 7 (32/64-bit), Max OSX 10.11, Max OSX 10.10, Max OSX 10.9, Max OSX 10.8 Speaker: 1 x Full range speaker Frequency bandwidth for sound pickup: 100 Hz to 20,000 Hz Frequency bandwidth for playback: 190 Hz to 20,000 Hz Radio interference standard: FCC (Part15B) Class A, ICES-003 Operating environment Temperature: 0 to 40°C (32 to 104°F) Humidity: 20 to...