The Talkshow Gadget adds useful broadcast features to your live mixer. LED illuminated buttons give you instant activation and deactivation of four microphone allowing you to get the mix righ then leave the faders in place. You also now have speaker volume control and a second input for listening to an external source. Your monitor speakers will mute automatically to prevent feedback when any mic is hot. And speaking of hot mic the Talkshow Gadget even provides logic to illuminate an ON AIR signs or mic arm tallies to let everyone know you re on the air.No with one of those cool little live mixers and your Talkshow Gadge you re ready to host your own radio show! At a fraction of the price of a purpose-built radio mixer.Connections are simple. There is a defacto standard most live mixers use for microphone inserts. They use the same standard. A cable with a _ inch TRS connector at both ends is all you need to connect each microphone insert to the Talkshow Gadget. The same type of cable can usually be used to make the other gadget connections also. The Talkshow Gadget can accept balanced or unbalanced audio sources.The audio signal path is completely passiv with sealed switches and gold-contact relays. The pushbuttons have long-life LED illumination. On the logic connecto dry relay contacts are provided which activate when the monitors mute to drive an ON AIR sign or lamp to alert others that microphones are live. A mute override logic signal is provided for each microphone if you do not wish it to mute the monitors.Mic control and monitor muting for small audio mixers. 120V version with USA power plug.