A good guitar tuner is a necessity to a good guitar player. This compact and useful guitar pedal tuner is a good accessory for electric guitar. It is designed with true bypass to minimize tone loss and get more control of your pedal. Get one before supplies run out!Features:Scientific and rigorous tuning program to make tuning more accurate and stable.Professional， mini size， compact， and universal.True bypass design， minimizes tone loss and get more control of your pedal.Designed with pedal switch， make it convenient to tune.Magnalium alloy housing， good durability. DC 9V adapter power supply.Two digital tube display indicate the string number and the pitch name. A great assistant for guitar playing.Specification:Color: BlueInput: 0.25in monaural jackOutput: 0.25in monaural jackPower requirement: AC adapter 9V DCCurrent draw: 20mAProduct size: 9.1 * 3.6 * 5 cm / 3.6 * 1.4 * 2inProduct weight: 136g / 4.8ozPackage size: 10 * 4.8 * 5.7cm / 3.9 * 1.9 * 2.2inPackage weight: 152g / 5.4ozPackage List:1 * Guitar tuner pedal1 * User manual (Chinese and English)