The Micromix 1 USB is a two channel mixer running from a 5 volt supply. Both channels have gain, volume, treble, bass and pan, but one has variable input gain, and the other has switched gain, and a HiZ function for instruments. It can be powered from a phone charger for stand alone use, or powered from a USB socket on a computer, where it can also be used as a recording interface.
If you are interested in IEM's, this unit can mix your bass on one channel with an Aux-out feed from your mixer into the second channel. If you want to try an ambience mic to pick up stage sound, the package includes a basic but serviceable Maplin / Tandy electret microphone.
If you want to set up a youngster with a basic recording system, I will also include an instrument lead.
Price includes postage within UK mainland.
David