The AW-OTG-POLY/AW-OTB-POLY represents the perfect combination of exceptional precision and stunning visibility that guitarists and bassists have been longing for. Each tuner comes equipped with cutting-edge OLED screen technology, allowing the display to be clear, smooth and perfectly visible from any angle. Additionally, its polyphonic tuner function allows you to play all strings at once and know at first glance which strings are out of tune. The AW-OTG-POLY/AW-OTB-POLY tuners offer a brand new tuning experience!