Features:Multifunctional water quality tester, which can test PH, EC, TDS, and temperature of the water.Fast to get the testing result and can test the PH value for any 0-14PH liquid which you wanna test.Adopts the digital screen display with backlight, which is more clear and convenient to read data.Compact pen-shape design, lightweight, you can test water anywhere to get the purest water.Use to measure the PH & EC & TDS & TEMP of solution.Large LCD screen to display the result, easy to read with high precision.Apply in water sources, aquarium, hydroponics, spas, swimming pools, and other water systems.Measurement range:TDS: 0-1999ppm, 0-19.99pptEC: 0-1999uS / cm, 0-19.99mS / cmPH: 0.01-14.00pHTemperature: 0-50 / 32-122 Resolution:PH: 0.02PHEC: Shi 2% F.STDS: Shi 2% F.STemperature: Soil 0.5 CAuto-off: 5 minutesOperating temperature: 0 ~ 50 Specifications: Item Name: Water Quality Tester4 in 1, Easy to Read, PortableMaterial: ABSMaterial: PlasticAuto Power-off: 8minBattery: 3 x 1.5V AG13 Battery (not included)Calibration: 2 Points (6.86, 4.01) or 1 Point (6.86) CalibrationSize: 18.8cm x 3.5cm x 3.5cm/7.4" x 1.38" x 1.38" (Approx.)Package includes:1x pH meter(Batteries not included)Note:Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. wish you could understand, thanks.