Yamaha YT150 Guitar/ Bass Auto Tuner Tuning for electric guitars and basses (4, 5, or 6 string) Built-in microphone for tuning acoustical guitars as well Auto mode offering fast tuning by automatically selecting the closest tone programmed in the tuner Large, easy-to-read liquid crystal display presenting notes in the exact order as your gear Tilt slot allowing you to insert a coin into the slot and tilt the tuner back for easy viewing