BOSS TU-3S Super-Compact Chromatic Tuner Interfaces It has two selectable modes:

It has two selectable modes: a "Vintage" mode for a classic wah sound and a newly developed "Rich" mode that offers a full

Patented laminated Varimotion diaphragm

First String Pair:

USB-powered or via optional external adapter

BOSS TU-3S Super-Compact Chromatic Tuner Interfaces It has two selectable modes:BOSS TU 3S Super Compact Chromatic Tuner Ideal for Crowded Pedalboards! The BOSS TU 3S Chromatic Tuner is a compact, space saving version of the industry standard TU 3 pedal. It provides the same rock solid tuning performance in a smaller footprint, making it an ideal choice for crowded pedalboards. Its bright, high visibility LED meter ensures quick and accurate tuning in any lighting condition, from a dark stage to a bright outdoor venue. The TU 3S