Refer to the current PFD Pilots Guide for minimum software needed for RVSM: ![][1] Pilot Guides can be found on the main avidyne.com site, under Support. [1]: https://hf-files-oregon.s3.amazonaws.com/hdpavidynesupport_kb_attachments/2020/02-20/7d7e30b7-17bc-4624-973c-c66429376890/image.png ...