This tuner I bought because I was tired of repeatedly to take my big on lessons. This tuner fits in your guitar case and is always at hand. Very easy operation and is self-explanatory, and not only the guitar can be tuned, but also the violin etc. I bought several identical, so each floor of my apartment at least one lying around and quickly at hand when you need it. Red = sound is not correct, GREEN = tone is indicative voted. Simple and super. On the downside, the axis of rotation is designed only to 270 degrees and therefore a turn in all directions, depending on clamping the tuner is not possible. But only a small minus (unfortunately I can not deduct half a star).
