מכוון טיונר כרומטי לגיטרה בוס Boss TU01   Renowned BOSS tuning quality in an affordable clip-on tuner Features Chromatic, Guitar, Bass, and Ukulele tuning modes Convenient reference pitch function (A=440 Hz)   Runs for up to 25 continuous hours with a CR2032 lithium battery Auto off function to preserve battery life when the tuner is not in use