Boss TU-3S Tuner Pedal

The Boss TU-3S Chromatic Tuner is a compact and always-on tuner that delivers the trusted performance of the TU-3 in a smaller footprint. Designed to save valuable pedalboard space it features the same bright 21-segment LED display and tuning precision with Chromatic Guitar and Bass modes plus support for drop tunings and extended-range instruments. Ideal for pedal switching systems like the BOSS ES-8 and ES-5 the TU-3S stays constantly active without a footswitch ensuring instant tuning feedback. It requires a PSA-series power adaptor and cannot be powered by batteries.