The RevoL effects GUITAR TUNER EPT-01 is a simple and easy-to-use pedal tuner. In addition to its small size that doesn't take up much space, it features a true bypass design that doesn't degrade the original sound. The sound is muted during tuning (when the tuner is on). The FLAT button allows for half-step down tuning. ※ This pedal is for 6-string guitars only. ■ Specifications Input - 1/4" mono jack (impedance: 1MΩ) Output - 1/4" mono jack Power - DC 9V adapter (center negative) Current consumption - 20mA Size - 93.5mm (D) × 42mm (W) × 52mm (H) Weight - 160g ■ Simple and Easy to Use The only controls on the unit are the ON/OFF footswitch and the "FLAT" button for setting half-step down tuning. It's simple and easy to use, minimizing the chances of trouble due to operational errors. Thank you for viewing. Manufacturer...Revol effects Type...Electric Guitar