Korg AW2G Clip-On Chromatic Guitar Tuner Clip-on chromatic tuners that attach directly to a string instrument for cable-free tuning AW2G comes with a clip that's optimized for attaching to a guitar headstock Double ball-joint allows multi-angle positioning with far greater mobility for the display section Internal backlight ensures excellent visibility even on a dimly lit stage Energy-saving Auto mode automatically switches to the low-power Soft mode when no sound is present