A padded instrument clamp holds tight and keeps the tuner in place. Small but mighty, the N-5 is powered by a single 3 volt battery and since it tunes chromatically by picking up instrument vibrations it works great for both standard and non-standard tunings. Within the packaging is a foldout Superstar Chord Book full of the best chords from the best players on earth. Also included is a snap on pick holder which can be secured atop the tuner. 3 picks can be loaded into the grooves at one time, ready for you to grab!