1、Multi Function: This 4 in 1 water tester supports PH, EC, SALT and temperature testing, providing more convenience. 2、High Accuracy: This 4 in 1 water tester features automatic recognition and automatic temperature compensation, which ensures high accuracy. 3、Wide Application: This 4 in 1 water tester is widely used drinking water, sewage treatment, water purification, fish tank, aquaculture, swimming pool, hydroponic, medical treatment and so on. 4、Backlit Function: This 4 in 1 water tester possesses backlit function, easy and convenient to read the results in dark environment. 5、Easy Operation: This 4 in 1 water tester is easy to operate, just immerse the pole in the solution and stir gently, then short press the "MODE" key. 1 x PH Tester (Battery Not Included)1 x User Manual1 x Plastic Box Item Type: PH TesterMaterial: ABSBattery: 4 x 1.5V LR44 Button Battery (Battery Not Included)PH Measurement:Measuring Range: 0.00- 14.00Measurement Accuracy: + 0.1PHEC Conductivity Measurement:Measurement Range: 0.0- 1999.9us/CM; 2.0- 20.0ms/CMMeasurement Accuracy: ±2% F.SSalt Salinity Measurement:Measurement Range: 0.0- 1999.9mg/LMeasurement Accuracy: ±5% F.S℃ /℉ Temperature Measurement:Measurement Range: 0.0~ 60.0℃( 32.0- 140.0°F)Measurement Accuracy: ± 1.0℃(± 1.0°F)Features: Backlit FunctionProduct Size: Approx. 19 x 4 x 4cm / 7.48 x 1.57 x 1.57in ( Manual Measurement, Slight Error May Exist )Weight: Approx. 210g / 7.41oz