Fangrui Product Details [speed Accuracy] Integrated With The Newest Sensor And Probe, Let You Get Data In Seconds. Just In About 1 Inch Of Water Instantly You Get The Reading. Also Upgraded With Big Backlit Lcd Make Reading Easier! [easy To Use] Our 3-in-1 Tds Meter Is An Easy-to-use A Hand-held Digital Meter To Instantly Check Your Overall Water Quality. It Allows You To Stay On Top Of Your Drinking Water Quality At All Times! A Compact Design With A Case Bonus Can Let You Take It Anywhere You Need [multipurpose Must-have For ] Worry About Water Quality The Tds Meter Is A Great Water Quality Test Tool For Drinking Water, Water Filtration And Purification Systems Such As Ro Systems Or Di Systems, Aquariums, Hydroponics (test Nutrients), Pools And Spas, Commercial And Industrial Applications, And More [integrated 3 Test, Tds Ec Temp] Three Different Measurement Needs Can Be Fulfilled By One Water Tester Meter. Not Only Be Convenient , But Also Saves Your Time And Money, Absolutely A Helpful Water Test Kit For Your Water Safe