4-channel-Mono-microphone-mixer-RVFM-Microphone-Mixer-4-Channels-90m V-Record-Output-600R-Headphone-Impedance-Fitted-with-6-3mm-Jacks-on-All-Inputs-&-Output-Inputs-have-Individual-Volume-Controls-&-a-Master-Volume-Control-for-Each-Output-Channel-Housed-in-a-Sturdy-Metal-Case-with-ON-OFF-Switch-&-LED-Power-Indicator 4-channel-Microphone-Mixer