Before your first Retro Tapes spin
96.47% and 96.71% are the long-run return figures for the two RTP versions of Retro Tapes, measured over very many rounds. How often the bonus round comes is not known in advance. The result of one session is random whatever the RTP, so a session can end above or below the bet total at any point.
96.71% is the higher of the two versions. Which version a table runs is shown only in the game rules, so read them before the first spin. The other version, 96.47%, pays slightly less over the long run, and one session can still go either way.
x10,000 is the cap on a win, measured against the bet you placed. The ceiling is reached very rarely, so a top prize is not a result to plan around. At the A$10 example bet, that cap is A$100,000.