The Boss TU‑2 integrates the reliable TU‑Series tuning tech into a stomp-style pedal featuring an 11-point LED meter with “Stream” and cent modes, seven tuning modes for guitar, bass, and chromatic use, and adjustable reference pitch (438–445 Hz). With ±3 cent accuracy across eight octaves (C0–C8) and a mute/bypass switch, it delivers silent tuning and seamless signal integration—while also powering other pedals via its DC out. Although discontinued, it remains a pedalboard mainstay thanks to its durability and intuitive design