Never used device - Biorad PR 4100 Absorbance Microplate Reader, bought directb from Biorad The PR 4100 microplate reader is the next generation 8-channel absorbance microplate reader by Bio-Rad. It provides accurate, reproducible and fast measurements and a compact and innovative design. It is controlled via a Notebook PC. Improved Reliability Latest LED Technology for long life and maintenance free operation 8-channel absorbance microplate reader for fast measurements Comprehensive QC function with multicheck plate Innovative Design Compact foot-print Standalone reader operated through a Notebook PC Windows® 7-based software Comprehensive Data Analysis Software Power Data Analysis with full qualitative and quantitative EIA analysis Return Policy Items are sold as-is with no returns or refunds available unless explicitly stated.