This tuner worked flawlessly for 8 months. It really was great. Then it wouldn’t turn on but it has a reset button that I used returning it to life! Sadly after the reset it was unreliable. It would randomly overwind the strings causing me to quickly remove it before the string broke. And yes I was plucking the proper string. It is addicting causing you to tune the guitar quite often since it is quick. Especially on a 12 string.