Features: 17 In 1 Function: Water quality tester with full function, can measure PH, TDS, TEMP, EC, salinity, SG, ORP, switch at will, simple and portable. 2Application: Water quality meter is suitable for drinking water, aquaculture, swimming pool, etc, for the determination of various values of water quality. 3High Accuracy: This water quality testing pen has high accuracy electrode, using titanium alloy probe to ensure accurate measurement values. 4LCD Display: Digital water quality tester, large screen high definition LCD display, clear values can be easily read, suitable for all walks of life testing. 5Efficient Measurement: This water quality meter using high performance pen shaped design, to ensure rapid detection, stable and accurate values. Package included: 1 x 7 in 1 Water Quality Tester (Battery Not Included) 1 x Manual 3 x Detection Powder