The Korg Pitchblack X mini features a built-in Ultra Buffer. The majority of electric guitars use passive pickups with a high impedance output. When you are using a cable there is a loss of tone, usually high frequencies, after about 6 m (around 18 feet) and this problem gets worse the longer your cable. A buffer boosts the signal over long cables to avoid loss of tone, keeping it clean and clear - even when your pedal is off. The Ultra Buffer enhances the sound quality in bypass mode, so that you can still maintain audio quality even when using a long cable to connect to the tuner, or when inserting the tuner into a complex effects board. Meter LED Offers Bright ModeThe bright mode (brightness) can be set at one of two levels, so that you can be sure to see the tuner display even better in situations where visibility is difficult, such as brightly lit stages and bright outdoor environments. Ultra-High TuningThe Pitchblack X mini offers highly precise and accurate tuning within a precision of ±0.1 cents when in Strobe mode, making it ideal for situations where the tuning must be absolutely right whether performing or recording. Four Meter Display ModesSelect from four types of meter display to match your requirements. Aside from the typical Regular mode, you can use Strobe and Half Strobe mode to indicate changes in pitch by the direction and speed that the meter is flowing in to distinguish even the finest differences in pitch; and you can use Mirror mode to see two LEDs on the left and right crossing together towards the center as you tune your instrument. Built-In Just-Right Tuning DisplayThe Pitchblack X features a new just-right tuning display function, which makes the triangular LEDs on both sides blink when the tuning is correct, helping tuning be a stress-free experience. | Korg PBXMINI Pitchblack X Mini Pedal Tuner