Possesses phosphatase activity toward para-nitrophenyl phosphate (pNPP) in vitro (PubMed:15641802). Possesses phosphatase activity toward several phosphotyrosine-containing peptides in vitro, with low peptide substrate specificity (PubMed:18759246). H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate Possesses phosphatase activity in presence of Mn(2+), Co(2+), Ni(2+) or Zn(2+). No phosphatase activity in presence Ca(2+). Inhibited by EDTA. Optimum pH is 5.5. Belongs to the HAD-like hydrolase superfamily. EYA family.