... Both in the supply and in the device !!! Have only since Christmas at the age of 43 get a guitar. And me right this tuner ordered. The handling is even for me - so for the absolute beginner - easy and fast from success crowned. One can tune his guitar within 5 minutes here. Handling simple and almost self-explanatory. What makes for a quick success. Price performance - super .... The INVESTMENT is immediately paid. Now true my guitar and I have to keep practicing ... -> Who his guitar - would agree quickly - - also works with bass> Buy yourself this little "miracle device" !!!!! ... So now need to maintain ;-)