Convenience Use5 Seconds Know The Water Quality, Accuracy, Faster. This Combo Set Of Tds Ph Ec Temperature. Besides, It Has The Best Price, Reliable Quality, All Make It Your First Water Quality Test. Automatic Humanized DesignAutomatic Temperature Compensation Automatically Accounts For Temperature Changes (0~ 80 Degrees). Ph Meter No Adjustment Screwdriver Needed, Just Complete The Calibration With The Auto-Calibration Button And Included Buffer Powders. 00 (Ph), While The Ec And Tds Digital Meter Numbers Range From 0 To 9990 Ppm. Ph Resolution Is 0.01Ph, Accuracy 0.05Ph.Tds: 0~9990Ppm, Conductivity: 0~9990Us/Cm, Accuracy: 2%. Portable And UpgradeableDesigned Feature Handy Size ThatS Great For Carrying In Your Pocket And Testing The Waters No Matter Where You Are. Upgraded Backlit Lcd Display Is Easy To Read And Automatically Shuts Off. Wide ApplicationIdeal For Home And Laboratory Ph Testing Including Drinking Water, Liquid Electroplating, Boiler Water, Aquarium Water, Swimming Pool Water, Photographic Rinsing Fluid, Well Water, Deep Groundwater, Aquaculture, Food Processing And Moreover.