D'Addario NS Micro Tuner

Highly precise clip-on tuner for a wide range of instruments including guitar, bass, ukulele, banjo, mandolin, and more
Discrete, highly compact design hides behind the headstock and is small enough to leave on every instrument you own - get one for each case
Extremely accurate chromatic tuning based on vibration, no sound or cable input required
Adjustable ratchet mechanism and reversible screen allows for placement on front or back of headstock
Visual metronome feature for additional practice aid