Single edition - One time, single download option. Lifetime edition - Access to all future updates option. [Recommended] Select option when purchasing. See FAQs for further details of editions. The OP-Z Notebook.A Notebook, A Guidebook, A Reference. The OP-Z Notebook is packed with walkthroughs, diagrams and explanations for getting the best from Teenage Engineerings compact sequencer and synthesizer. Also designed specifically to add your own notes and comments. - OP-Z OS version 1.2.45 OS February 2023 - includes App and Device updates - Over 270 Pages of content. - PDF Format for maximum compatibility. - Including bookmarks ideal for smartphones, tablets and desktop - Covers all things OP-Z. Walkthroughs, Tips, Guides, Illustrations - Hyperlinked contents and pages for easy navigation and PDF bookmarks. - Ideal for both a novice and advanced user. - Designed with your own notes in mind. Perfect companion to the OP-Z.