Korg AW2GRE Clip-On Guitar Tuner - Red AW2G comes with a clip that's optimized for attaching to a guitar headstock Clip-on chromatic tuner that attaches directly to a wind instrument or string instrument. 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