amg wheels

A warning sign came up to say that tyre pressures were low ,Question is it came up in PSI then went into the metric symbol ,I know how to alter MPH and all that but i can't get it to go back into PSI any thoughts. Thanks

Hi Selling two 19" AMG 14 Spoke Wheels. One with new Pirelli P Zero 235/35, both with TPMS sensors, and 4 original AMG Valve caps Recently refurbished(still have sealant/grease on) so immaculate condition. £950 Cash, or bank transfer Alas, I have nothing I can use to safely ship them so...