Pitchblack Blue

Chromatic Tuner - Metallic Blue

Compact pedal sized guitar/bass tuner that fits in your pedal board.
Large bright LED meters clearly show any tuning discrepancy. Choose from four types of display modes: Full Strobe, Half Strobe, Meter & Mirror
A broad detection range from E0 (20.60 Hz) to C8 (4186 Hz).
Calibration is adjustable from 436--445 Hz.
100% True Bypass output keeps your tone intact
A 9 VDC output jack is provided for cascading the power supply to other pedals.
Sleek, black and tough aluminum die cast body for superb durability

https://www.korg.com/us/products/tuners/pitchblack/