Clip-on chromatic tuners that attach directly to a wind instrument or 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