The Shadow Electronics E-Tuner Humbucker Frame allows you to transform your archtop electric guitar with humbuckers into an instrument with built-in tuning. This revolutionary chromatic tuner installs discreetly inside your guitar's humbucker cavity, requiring no permanent modifications. The Shadow E-Tuner's responsive circuitry enables fast, precise tuning and will not alter your guitar's tone. Its brightly colored LEDs are clearly visible in any environment and the one-button control and automatic shutoff ensure the tuner is ready when you need it.