Features:1. This is a digital TDS meter tester to test the filter water qualitypurity,tochecktheperformanceofyourwaterfilter,tocheckforhardness,tomakesureyoualwaysdrinkpure water.Savesmeasurementsforconvenientreadingandrecording.2.Autoofffunction:turnsoffmeterafter5minutesofnonusetoconservebatteries.3.Automatictemperaturecompensation.4. Gold-plated chip performances more stable.5. Can be used in : Water purifiersand(vegetable,fruit)&drinkquality,monitoring,poolsandspas,aquarium,hydroponics.6.LCD readingisconvenientandeasy.Specification:ype:PortableWaterQualityTesterTDS01Measurementrange:0999us/cmResolution:1us/cmTesttems:heavymetals,totalhardness.Voltage supply: 2 X 1.5Vbuttonbattery((notincluded))Accuracy:+/-2%F.SColor:BlueSize:about142x25x14mmWeight:about62gkeyword:waterqualitytester,TDSmeter,filter,testpen,LCD