Moozikpro Guitar Tuner Clip On Acoustic - Old-School Computer Style Design - Precise Tuning & Multi-Instrument Chromatic Tuner OLD SCHOOL COMPUTER STYLE DESIGN - Highly compatible and light guitar tuner clip on. PRECISE VIBRATION CLIP - Accurate tuning results every time and no sound or cable required. MULTI-INSTRUMENT - Great as guitar tuner, violin tuner, bass tuner or ukulele tuner. 360 ROTATIONAL VIEW - Convenient positioning with strong and secure silicone padded clip. BATTERY AND MANUAL INCLUDED - Chromatic tuner 100% lifetime satisfaction guaranteed.