1Suitable for testing pH value in drinking water, swimming pools, aquariums, RO systems, spas or hydroponics. 2The electrode can be directly inserted into the measured solution, protected from magnetic interference in water. 3High precision and accurate response: fast to get the testing result and can test the TDS value for any 1999ppm liquid which you wanna test. 4Compact and lightweight for mobility, you can test water anywhere to get the purest water. 5Large screen and waterproof design, it is easy to measure and observe the data. 6One measurement can be completed in 5 seconds with accuracy up to 2% for better performance.Condition: 100% Brand NewItem Type: Water Quality TesterShell Material: ABSModel: TDS-3Color: Light GreenMeasurement Range: 1-999PPMTemperature: 0-80 Accuracy: 2%Battery: 2 x 1.5V LR44 Button Battery (not included)Size: Approx.155 x 29 x 15mm / 6.1 x 1.2 x 0.6inWeight: Approx. 56g / 2oz1 x Water Quality Tester1 x User Manual1. Please allow 13cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.