Feature 1Multi Function: This 4 in 1 water tester supports PH, EC, SALT and temperature testing, providing more convenience. 2High Accuracy: This 4 in 1 water tester features automatic recognition and automatic temperature compensation, which ensures high accuracy. 3Wide 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. 4Backlit Function: This 4 in 1 water tester possesses backlit function, easy and convenient to read the results in dark environment. 5Easy 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.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(32.0-140.0F)Measurement Accuracy: 1.0(1.0F)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 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x PH Tester (Battery Not Included)1 x User Manual1 x Plastic Box