ConnectionsUSB interface (mini B connector)
3.5 mm external loudspeaker and microphone jack
Daisy chain expandability of up to 15 unitsVolume ControlVolume Up / Volume Down buttonsPower Consumption5V 500 mA peak through USB and wall mount AC/DC convertedAudio50 Hz - 16 kHzLatency10 msBroadcast LevelBroadcast level (peak): 92 dB SPL @1 m (5 W RMS)Bridging FeaturesThree-way bridging capabilityNoise CancellationNoise cancellation > 10 dBDuplex Operation100% full duplex - no attenuation (in either direction) during full duplexConformanceITU-T G.167Echo Cancellation> 40 dB with conversion speed of 40 dB/sec, residual echo is suppressed to the environment noise level, preventing artificial ducking of signalMicrophones4x directional microphonesAlgorithmDirection-finding algorithm (determines the presence and direction of a speaker)
Beamforming algorithm (forms and directs audio beams towards a defined direction)Output Level AdjustmentAutomatic voice-level adjustment (AGC)SoftwarePlug-and-play - No installation or drivers
Audio setup utility is available for Windows
The setup utility helps monitor the audio input and output level but is not required
Recording utility is available for Windows
Recording utility allows you to record conversations to your computer via the device
Operating systems: Windows 98 and up / Linux / Mac OSColorWhiteDimensions7" (17.8 cm) diameter, 1.9" (4.83 cm) heightWeight1.75 lb (0.8 kg)