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The BOSS TU-3S Chromatic Tuner provides the same function, accuracy, and display, as the TU-3—a go-to stompbox tuner for many electric guitarists. However, this model doesn't sport a muting footswitch; it's always on. This feature, in addition to its small size, renders it suitable for integration in any pedalboard or stompbox rig in which space-saving is paramount. It features tuning modes for six- and seven-string guitars, bass and six-string bass guitars, as well as flatted options for players who like to operate in lower frequencies.

Notable Features

• Respected TU-3 tuning performance in a more compact size
• 21-segment LED meter with brightness control
• High Brightness mode for meter visibility outdoors
• Accu-Pitch Sign function provides visual verification when tuning is complete
• Chromatic and Guitar/Bass modes, with support for 7-string guitars and 6-string basses
• Guitar Flat mode supports "drop" tunings up to six semitones below standard pitch
• Powered by optional PSA-series adapter; DC Out jack for powering up to seven BOSS compact effect pedals via an optional PCS-20A daisy-chain cable