The Cell Viability Reagent for ADAMII™ LS is a ready‑to‑use single reagent combining Acridine Orange (AO) and 4′,6‑diamidino‑2‑phenylindole (DAPI) for total cell counting and viability analysis. It enables AO/DAPI staining for fluorescence‑based counting and viability testing, is simple to use, and is designed to work with ADAMII™ Assay Slides to deliver fast, accurate results on the ADAMII™ LS automated cell counter.