- for users demanding fast, reliable, repeatable results with ease of useDESIGN FEATURES- Fast easy to read results with large digital LCD readout- Accurate to ±5 FNU or 5% of reading (whichever is greater)- Lightweight and portable- Tungsten Lamp for high accuracy- Easy measurement: just fill a cuvette with the sample after calibration, insert the cuvette, then press "read" and the reading displays on the large LCD- Simple easy-to-use calibration cuvettes- Easy 1-2-3 instruction steps- Auto shut off after 5 minutes of non-use, 9 volt (battery included)