New boxster owner-question

[eagle66]

Just bot a 1999 Boxster in good shape 137K miles, had oil changed, they checked things and inquired about the serpentine belt, I think it was replaced around 35K miles back or approx 3 years. Is this the fan, water pump that runs the alternator etc like a fan belt on say a Ford or Chevy or is it a timing belt....if not does the Boxster have timing chain or belt??? Thoughts???