Korg's AW-2G is an excellent clip-on guitar tuner. With its double ball-joint and adjustable-angle clip pad, you can easily clip it to a variety of different headstocks and position it into a comfortable spot for viewing. What's more, the tuner's display can swivel from side to side, so you an tune invisibly onstage, swivelling it behind your guitar's headstock. The AW-2G features an internal backlight, for low-light stage environments. You can tune with the internal microphone or with the Korg AW-2G's vibration-sensing Piezo sensor.