As another reviewer notes, an instruction book would be helpful.

Works much like the famous Korg tuners, in that you clip it on the headstock of the guitar, sound each string, and raise or lower the pitch until you have the correct note (indicated by a letter E, A, D, G, B, E

only 'tunes' a single note - if it actually worked that is.

Spare yourself the embarrassment of sour notes and the expense of high-priced tuners with this D’Addario Eclipse Headstock Tuner

I've used some in the past which have been much more flimsy, harder to read the display, and in general just make it a pain to figure out if you have the right note

It doesn't seem to get too confused, and displays the proper note fairly consistently

As a professional musician, getting in tune on site, accurately and quickly literary starts you on the right note or wrong foot if your guitar is out of tune

It would be nice if it had a beep when you were on the right note for people who can tune by ear but just want the precision at the end, but that missing feature wasn't enough to take a star off.

Cons: I hadn't needed to use this in a few months, and when I turned it on recently, its display began doing strange things, like flashing the name of the key instead of showing a steady note

Power on in 2 seconds, bright colorful display and the visual note being displayed and how "on" the string is (or sharp or flat) is very intuitive.

n’t find it very useful

When I'm tuning the A string, the display will register as "E," but the blue bars and arrows work fine.