Boss TU-2 Chromatic Tuner Pedal

From BOSS:

The BOSS TU-2 Chromatic Tuner incorporates BOSS' world renowned TU-Series tuner technology into an ultra-convenient stompbox design. For the first time ever, guitarists and bassists can now tune their instruments with unrivaled accuracy and an unmatched tuning range--with just a single stomp.

FEATURES:

• BOSS world-renowned TU-Series tuner accuracy in a convenient stompbox design

• Mute/Bypass select for silent tuning with a single stomp

• 11-point LED indicators and new "stream" meter display tuning discrepancy via speed and direction of LEDs (speed of LED movement gets slower as pitch becomes more accurate)

• 7-segment LED displays string and note names, easily visible on dark stages

• Seven easy tuning modes include Chromatic, Guitar Regular, Guitar Flat, Guitar Double Flat, Bass Regular, Bass Flat, Bass Double Flat

• Tuning mode setting and display style choice stored in memory

• Adjustable reference pitch from 438 to 445Hz

• 8-octave tuning range--the widest in its class

• Footswitchable Tuner Off mode preserves battery life by disabling LEDs.

https://reverb.com/en-no/item/56805304-boss-tu-2-chromatic-tuner-pedal