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With the TU-3W, BOSS brings Waza Craft mojo to the world’s leading stompbox tuner, the TU-3. Pure, uncolored signal transfer is essential for a tuner, and the TU-3W features redesigned circuitry with selectable buffered or true-bypass operation and the most transparent audio pass-through possible. The TU-3W delivers a premium pedal experience only available from BOSS.