I have owned a number of wireless guitar systems and I have to say I am impressed with this little unit. I am on my way to a completely wireless setup with the NUX B-2 wireless guitar system. I have tested it out in rehearsal an live setting for the past four weeks and really like being able to move around stage as needed without being tethered to a cord. I tested it on electric and acoustic guitars and both performed with with this unit. It uses 2.4ghz to transmit the signal and can dial in one of four pre-programmed frequencies.