Optical, 3.5mm, RCA, 6.35mm, External Microphone Optical, 3.5mm, RCA, 6.35mm, Coaxial Optical, 3.5mm, RCA, USB Left / Right Balance Yes No No Three Sound Mode – Speech, Bass, Balance Yes No No Ambient Mode Yes No No Volume Range Higher High Normal Backup battery Yes No No Charging Dock Yes Yes No Use Each Unit independently with Other devices No

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