FunctionsandFeatures: Full-duplexconversation,crystalclearvoice Bestfortheconferenceroomwithin30m2andmicrophonesgathercover3m Support10attendees. DSPdeepechocancellation -60dB Bi-directionalnoisesuppressionpurifiesvoicesignalfrombothparties.Suppression -20Db. Hypercardioiddirectionalmicrophoneplusautomaticgaincontrolsatisfygroupconference Hi-Fiaudioamplifierandrare-earthNeodymiummagnetspeaker Convenienceredial,on-hold,muteandrapid-dial. CompatiblewithPSTNanalogynetworkandUSBVoIPnetwork SonicClearpatentedvoiceprocessingtechnology CE/FCCapproved. Easyinstallation