The Foxgear Multitune is, without a doubt, the best tuner on the market today and actually the only existing Polyphonic tuner able to work in polyphonic mode with any open tunings. Multitune will give you the time necessary to perfectly adjust the tuning with an almost "not-measurable" accuracy. The Multitune boasts relay assisted, true-bypass circuitry with zero effect on your clean signal. The Multitune is suited for stringed instruments in the range of A0 to C8. It is made in small sizes with a simple control and a super big and bright display. It stays always ON when a signal is present in Polyphonic mode. It includes both the Chromatic and Polyphonic mode. Just switch the button to Mute the signal and shift to Chromatic mode for fine tuning.