The Crossfire CFTN-525 Chromatic Pedal Tuner enables a guitarist to tune up quickly and accurately by muting while mid-performance. This sturdy switch operated pedal features a classic black finish with an easily readable pitch indicator, and is perfectly sized for comfortable operation. The CFTN-525 is made from high quality metal and springs, and made to endure through the rigors of the stage. This guitar pedal comes with a 9 volt battery but can also be operated with an AC adapter (available separately). This reliable and accurate tuner delivers excellent value for money and will certainly go the distance.