LCD Clip on Chromatic Acoustic Electric Guitar Bass Ukulele Banjo Violin Tuner Product Description - 100% brand new and unusedAn extra large LCD screen displays note name and tuning processTuning much easier with a moving hand on the screen and back lights.Two colour backlights - yellow - Sharp or Flat; green - In Tune.Tuning extremely sensitive and stableEasy to operate with only one control switchesEasy to clip onto any instrument.A4 Frequency 440HZ Specification Tuning Item - ChromaticTuning