BOSS TU-3S Chromatic Tuner Compact tuner

World standard tuning made more compact The TU-3S maintains the high accuracy and visibility of the TU-3, but is significantly smaller. When building a pedal board using a switching system, ON/OFF pedal switches for each pedal are not required. By combining it with the BOSS ES-5 or ES-8, you can create a flexible layout that effectively utilizes the space on your pedalboard.