CardioChek® PA Analyzer Multi-Chemistry Controls (Total Cholesterol, LDL Cholesterik, Glucose, Triglyceride, Ketones), Levels 1 & 2. Quality controls to check for proper performance of testing system. Results for the control should be in the range specified on the quality control range card. Compatible with all CardioChek brand analyzers and PTS Panels test strips. Multi-Chemistry Controls contain Cholesterol, Triglycerides, Glucose, and Ketone, which react with test strips to produce color or an electrical current (depending on test strips used). The darker the color is, the higher the analyte concentration. The result for each level of control should be in the range specified on the Quality Control Range Card included with these materials. Proudly made in the USA. UOM: 2/Vials.