Dell USB Speakerphone SP3022 Microphone Derwent Art * the two measured circuits

* the two measured circuits and the Shelly EM must be on the same phase

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Dell USB Speakerphone SP3022 Microphone Derwent Art * the two measured circuitsDescriptionSpecificationsShipping Command sound Your voice remains clear in meetings, with AI Noise Cancellation filtering out all background noise in your environment. Great audio quality True Stereo Output, with left and right speakers and wide band audio frequency range, gives you distortion free, rich audio, when whether you're hard at work or listening to music. Real time collaboration Full Duplex Audio allows multiple participants to speak