The Transferrin/FOB and Hb-Hp Combo Rapid Test is a rapid chromatographic immunoassay (non-invasive assay) for the qualitative detection of human hemoglobin, transferrin and Hemoglobin(Hb)-Haptoglobin(Hp) complex in human feces specimens that can be performed with the use of LF Portable Reader Plus, which might be useful for the diagnosis of bleeding gastrointestinal disorders.