Enables IgE receptor activity and IgG receptor activity. Involved in neutrophil activation and positive regulation of bone resorption. Located in cell surface. Is expressed in liver. Human ortholog(s) of this gene implicated in several diseases, including allergic disease (multiple); autoimmune disease (multiple); glomerulonephritis (multiple); hematologic cancer (multiple); and immunodeficiency 20. Orthologous to human FCGR3A (Fc fragment of IgG receptor IIIa) and FCGR3B (Fc fragment of IgG receptor IIIb). [provided by Alliance of Genome Resources, Apr 2022]