Planet Waves: PWCT06 S.O.S. Guitar Tuner The revolutionary Planet Waves S.O.S. Guitar Tuner solves your problems of tuning in dark or loud environments, relying upon two pulsing LED light beams to detect and indicate tuning accuracy. When the string is out of tune, the two lights will visually dance on the string being tuned. As you approach the correct pitch, the movement slows down and eventually stops when perfect tuning has been reached.
This visual method enables precise tuning in silent or noisy environments, without the need for audible sound or sensing of any kind - the ideal choice for acoustic guitars! The tuner has been designed in the manner of a plectrum, allowing you to pluck the string with the tuner itself.