  CP violation, fermion masses and mixing angles including that of neutrinos
are studied in an SUSY SO(10)$\times \Delta(48) \times$ U(1) model with small
$tan \beta$. It is amazing that the model can provide a successful prediction
on twenty three observables by only using four parameters. The renormalization
group (RG) effects containing those above the GUT scale are considered. Fifteen
relations among the low energy parameters are found with nine of them free from
RG modifications. They could be tested directly by low energy experiments.
