Optimized for guitar and bass. Tracks fast; very accurate. Clip on tuner with color changing, segmented (needle-like) display. Easy to use. Stay-Put clip, tap-tempo metronome. Fast and deadly accurate. Flat tuning/transpose feature, 415hz to 466hz calibration. Display rotates 360 degrees. Works on front or back of headstock -- good for left-handed players. High Sensitivity Vibration Sensor. Metallic Blue color. Excellent design. Uses CR2032 battery.