: With FunDADYUS 4 in 1 pH tester, you can accurately measure the PH, TDS, EC and Temp values. Comprehensive water quality testing to ensure we can use healthy water. : Just immerse the pH meters electrode in the target solution, press and hold the HOLD/TEMP button after the reading is stable, and then read the data. Before using pH meter again, please clean the probe carefullyto avoid affecting the reading. : With the highly sensitive probe, you can quickly read the results. Wide measuring range and high resolution of this 4-in1 pH meter guarantee that you can measure different kinds of liquids. : With the pH Meter's accurate ATC, the pH/TDS/EC/Temp function can accurately read sample values over a wide temperature range of 32F-140F. Effectively solve the problem of inaccuratemeasurements caused by changes in liquid temperature. : The water quality tester uses an advanced LCD backlit display design, making readings easier and clearer. The data can be clearly seen even in the dark. - : This pH tester digital helps you find out the quality of water for drinking, bathing, a cup of salt water, pools, etc. The pH tester digital also helps you get a clear insight into the nutrient levels inhydroponic setups, garden soil, etc. : Includes 1x digital pH meter, 1x usual manual, 3x 1.5V (LR44) coin cell batteries and 3x pH calibration powder.