"Smart Tuner t2" automatically adjusts all types of guitars and ukuleles. Control adjustment modes - Auto mode: daily ski surface processing for guitars and ukuleles - Semi-automatic mode: wide range tuning for guitars and ukuleles (low g ukulele mode included is applied) - custom mode: alternative tuning for guitar string winder - with 180 rpm electric string winder speed motor - up / d. Rerecognizable buttons - rechargeable lithium battery indicator - tuning distance display with percentages - lo/hello display tones for prevention and miss-blockages - overload indicator for damage to stuck rotation protect - low battery indicator design - easy grip design. - additional peg connector adapter for tulip-shaped head machines - simple peg connection plug