Compact metal housing design, High-precision tuning system, fast response With True-Bypass bypass function High-definition display can quickly identify pitch and note name Automatically mute output in tuning mode Flat and signs are uniformly displayed with the "#" symbol (such as "C#" is displayed as "C") Please observe the display bar when tuning: the central green light is on to indicate that the pitch is consistent with the note name on the screen, the red light on the left side is on to indicate that the pitch is low, and the red light on the right side is on to indicate that the pitch is high. Color: Black Material: Metal Package Contents: 1 * Guitar Pedal Tuner 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.