Chromatic Tuner for all stringed instruments.
2-1/2 x 1-3/4 x 1-1/8.
360 degrees rotating display. Compact size. Easy to read "red to green" status LED indicator screen. Automatic tuning mode. Button battery (included). Only 2-1/2" tall. Frequency 440 Hz. Displays red to green when you reach perfect tuning.