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Boss TU-2 pedal, chromatic tuner:
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.

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
Requires 1 x 9v battery (supplied) or PSA-240 power adapter (recommended)

In store Price: £69