Smart 3-in-1 portable meter (replaces MISM802) 1 probe for pH, conductivity and TDS Automatic Temperature Compensation Faster Processor with The New Chipset and Motherboard 100% Larger & Easier To Read LED Display Smaller, Ergonomic & Lighter Case Design Easier & Faster To Calibrate Longer Battery Life Specifications: Range - pH: 0.0 - 14.0 pH EC: 0 - 6.00 mS/cm TDS: 0 - 4000 ppm Resolution - pH: 0.1 pH EC: 0.01 mS/cm TDS: 10 ppm Accuracy - pH: ± 0.2 pH EC/TDS: 2% - Full Scale Conversion - .65 Calibration - Each Position: 1 Point - Manual Environment - 0 - 130F Battery Type - 9v Alkaline - Included