[Easy Way to Test Water] It's a good way to know if your water is at a good level, and to be able to get water filtration system working better. Everyone should test their drinking water every now and then, since it may play a major role in your overall health and well-being.[TDS Meter with ATC Function] Automatic Temperature Compensation(ATC): 32 °F-140 °F; Temperature affects reading levels, the tester with ATC function will ensures reading always be accurate at various temperatures.[3 in 1 Water Tester] TDS range:0-9990ppm; EC range: 0-999μS/cm,0.0-9.9mS/cm; Can test TDS EC TEMP quickly and accurately. Check PPM and EC values when doing water changes for fish tank and hydroponic nutrient solution, better known the condition of the water quality. perfect for drinking water, hydroponics, hot tub, spas, and aquarium.[Clear Digital Display with Alerts] With LCD screen, displays the information in an intuitive layout ensure you don’t misread the screen. When the TDS value is higher than 50ppm, the green backlit will change to red backlit to alert you.[Easy to Use] Just turn tester on and dip it into water to get instant reading on water quality. A must have for anyone who uses water!