Korg PBX Pitchblack X Guitar Pedal Tuner, 1/4 Jack, Black

Allows switching between true bypass and the newly-developed ULTRA BUFFER Meter LED also offers bright mode settings for high visibility Ultra-high tuning accuracy down to ±0.1 cents Four meter display modes Built-in “just-right tuning” display Runs on battery power or optional ACYou may also like Korg Pitchblack X Mini Pedal Tuner.