Condition:100% Brand New Item Type: Water Quality Tester Battery Attributes: 3 x 1.5V button battery LR44 150MAH (not included ) Technical Index: Range: pH 0.00-14.00 pH EC 0-19990us/cm 0-19.9ms/cm TDS 0-19990ppm 0-19.9ppt Temperature 0C-50C (32F-122F) Resolution: pH 0.01PH EC 1us / cm ( 1999us / cm) 0.1 ms/cm TDS 1 ppm ( 1999ppm) 0.1ppt Temperature 0.1C (0.2F) Accuracy: pH0.03 pH EC TDS2F.S Temperature 1 Temperature Compensation: 0C-50C Working Temperature: 0C-50C Size: Approx. 188 x 35 x 35mm / 7.4 x 1.4 x 1.4in1A water quality test pen that can measure four parameters: total dissolved solids (TDS), electrical conductivity (EC), salinity, and temperature. 2Multi?function detection mode, simple and convenient function switching, clear reading. 3High performance, portable ergonomic design, fast measurement, high stability. 4The size is 188mm35mm35mm, it is light, convenient to store and carry. 5Excellent workmanship, long service life, can provides precise measurement. 1 x Detector 1 x Screwdriver 1 x Manual