One step HBsAg test is a rapid direct binding test for the visual detection of hepatitis B surface antigen (HBsAg) in serum or plasma as an aid in the diagnosis of hepatitis B infection. Features: 1) HBsAg B11-11: a) Type: strip b) Specimen: serum/plasma c) Package: 1pc x 100/kit d) Specification: 3.0mm e) Sensitivity: 2ng/ml f) Specificity: >99.5% 2) HBsAg B11-20: a) Type: cassette b) Specimen: serum/plasma c) Package: 1pc x 40/kit d) Specification: 3.5mm e) Sensitivity: 2ng/ml f) Specificity: >99.5%