Fangrui Product Details This Product Contains One Ph Meter, One Tds/ec/temperature Meter, An Instruction Manual, And One Pack Each Of Ph Calibration Buffers 4.00, 6.86, And 9.18, Ph And Tds Each Have 2 X 1.5v Lr44 Battery (built-in). Ph Meter: Full Measurement Range Of Ph 0-14; High Accuracy Of 0.01 Ph, Reliable And Quick Readings. 3 In 1 Tds Meter: Measurement Range Of 0-9990ppm, 0-9990s/cm, 0-80.0(32.0-176.0; High Accuracy Of F.s. We Kindly Remind You Not To Use It To Test Sea Water. Reliable Automatic Temperature Compensation (atc) Ensures Testing Results Be Accurate Under Different Temperature Conditions. Ph Meter And Tds Meter, Respectively Adopt Low Impedance Sensitive Bulb And Agile Titanium Alloy Electrode Respectively. Remove The Protective Cover, The Switch Button, Immerse The Probe Of The Ph Meter/tds Meter In The Solution, And You Can Get The Reading Immediately. Comes With Protective Case; , Handheld Design For Portability And Convenience. Ph Meter And Tds Ec Meter Can Test Ph Balance, Suitable For Te