Features:1. Made of high quality material, durable in use.2. Lightweight and mini size, portable to carry.3. 4 in 1 function, can be used to test pH, TDS, EC and TEMP of water.4. Easy to operate and read the digits, convenient to use.5. Suitable for water sources, hydroponics, swimming pools and other water systems.Specification:Condition: 100% Brand NewMaterial: ABSRange:pH: 0.00 to 14.00pHEC: 1 to 19999us/cmTDS: 1 to 19999ppm0 to 60.0 / 32.0 to 140.0Resolution:pH: 0.01pHEC: 1us/cmTDS: 1ppmAccuracy (@25 / 77):pH: 0.05pHTEMP: 0.5EC: 2%TDS: 2%Calibration:pH 6.86 point: Accuracy 0.1pH6.86/4.00(6.86/9.18) points: Accuracy 0.05pH6.86/4.00/9.18 points: Accuracy 0.02pHEC Calibrated by factory (1413s/cm)TDS Calibrated by factory (1413s/cm)Temp. Compensation: Automatic temperature compensation (0-60)Battery/Auto power-off:3 x 1.5V button cell (Not Included)Battery Type: AG13 or LR44Auto power-off: 5 MinutesLow power protection system / battery indicatorEnvironment: 0 to 60.0 (32.0 to 140.0); RH 100%Size: Approx. 7.2 x 1.47 inWeight: Approx. 164g / 5.8 ozPackage list:1 x Water Quality Tester (Battery Not Included)Note:1. Please allow 0-1 inch 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.4. The product is shipped without powder.