| External interface: USB 2.0 Full Speed, Bluetooth, NFC (Near Field Communications), EXT IN/OUT (stereo mini) Microphone: Unidirectional × 3, Sound: Standard: Recommended 1.5m/Max 3m · SoundCap: 1m, Speaker: Full Range × 1, Volume: Instantaneous Maximum 91 dB (0.5 m), Frequency Band Sound: 100 Hz to 20,000 Hz · Playback: 190 Hz to 20,000 Hz, Signal Adaptive processing echo cancler, noise reduction, microphone auto tracking, auto gain control, reverberation reduction, SoundCap Power USB bus power drive:5V/500mA, AC power drive:AC100V (50/60Hz) *AC adapter sold separately. Supported OS: Windows 10 (32bit/64bit), Windows 8.1 (32bit/64bit), Windows 7 (32bit/64bit), macOS 10.14, macOS | |