Enables carbohydrate derivative binding activity. Predicted to be involved in several processes, including antifungal innate immune response; negative regulation of tumor necrosis factor production; and plasmacytoid dendritic cell antigen processing and presentation. Predicted to be active in external side of plasma membrane. Is expressed in ductus deferens; epididymis; and prostate gland. Orthologous to human CLEC4A (C-type lectin domain family 4 member A).