Keys Experts Verlag PSR-S 975/775 Praxis Buch 1, Reference Book, For Yamaha PSR-S 975/775 - S 970/770, Spiral-bound book format, Pages: 80, Includes a download link for accompanying software, *Note: Book is in the German language*@+*All topics are explained in workshops, including:*@+@+, General operation, Setting up the S class, Voice Select, One-Touch Setting (OTS), Registration Memory, Save, copy, and move files