Remotemix 4 is a four channel field mixer and headphone amplifier. More than just a field mixer, this is a communication interface..Radio - remotemix 4 was designed for live remotes. Use it as a phone line hybrid, calling into your studio talk show hybrid. Use as a front end mixer for your pots, isdn or ip code and laptop codec.Tv- Remotemix 4 gives you the ultimate phone connectivity with four ifb feeds. More than a field mixer this is a shoot saver.Great sound - bass boost ads some low end before sending the signal down the phone line.Bluetooth wireless technology -remotemix 4 will first attempt to connect in hands free mode to a cell phone. if this type of connection is not available, it will connect to any other product, such as notebook or portable that allows a Bluetooth wireless connection. This item is in used condition it has minor scratches on top and bottom. The power cord is not included. ..