The tuner for my guitar is easy to use and has a screen that I can see easily. When I haven't used it for 5 minutes, it shuts itself off to save power. The display changes color when a chord is tuned. It works perfectly, even better than expected. I got it for my ukelele but you can tune other instruments with it easily. #RankBoosterReview #Sponsored https://www.amazon.com/Stander-Multifunction-Adjusting-Skidding-Prevented/dp/B00S4NQYBY #MUGIG