Don't want to go through the whole process of updating your Stratux? That's okay, with this pre-flashed SD card just pop out the old sd card and pop in this new one. You're now updated! Yes, it really is that easy.
Ships with the most current stable main branch release or the most current AHRS branch. You will want the AHRS branch if you have the AHRS + Fan Controller Board. Otherwise, it's best to stick with the stable main branch release.