Sen2cor scaling of surface reflectance

Hello All,

Can anyone explain the scaling of the L2A imagery. It is not scaled between 0 -1 as many surf reflectance products are. What are the maximum and minimum scaling values?

This would be useful to know to for change detection image pairs are there massive differences between veg cover types that remain the same (notwithstanding conditions on day of retrieval)


if we say about scale factor after sen2cor is 10000.