ammoon SWIFF A2 Mini Clip-On Automatic Digital Tone Tuner LCD for Acoustic Electric Guitar Bass Chromatic Violin Ukulele Tuning through vibration, helps you to find the accurate tune of your instrument. Clip-on and 360swivel rotation design, easy and convenient to use. The automatic shut-off function when no operation for about 5 minutes. Comes with LCD screen, the string No. and note name will be showed on the screen together when tuning. Multi-instrument tuner, great for electric, acoustic bass, guitars, violin, ukulele.