7 in 1PH Meter Water Quality Tester PH/TDS/EC/ORP/S.G/Water Salinity/Temp Pen Tester - With Backlight7 in 1 PH Meter: The pH meter is designed with a 7-in-1 function,Simply press the {MODE/CAL} key,you can switch to measure TDS/EC/Salinity/Temp/ORP/S. G/PHLCD Display: The screen of the digital water meter adopts LCD,which clearly displays the data with backlightHigh Accuracy PH Tester: The digital water quality meter's high precision algorithm chip and electrodes ensure accurate and quick response. Once the reading has stabilized,simply press the HOLD/TEMP button to lock the reading and take it out for viewingIP67 Waterproof Grade: Prevent dust and soak for a short time,(Can be used even if dropped into an aquarium). The glass bulb at the tip of the PH pen is easily broken,so please be careful when using it or drying itWide Application: The 7-in-1 ph tester digital is suitable for testing household drinking water,hydroponics,swimming pools,aquariums,laboratories,etc. The salinity tester has multiple uses,not only detecting the salt content of edible salt,saltwater ponds,and koi ponds,but also detecting the salinity of seawater,oceans,and saltwater fish pondsSpecifications:Material: PlasticEC measurement range: 0 to 10000uS/cm 10.01-19.99ms 20.1-400 mS/CMResolution: 1uS/cm; 0.1 milliseconds/cmAccuracy: 2% of the readingTDS measurement range: 0 to 1000ppm,1000ppm to 10000ppm,10.1 to 200.0pptResolution: 1ppmAccuracy: 2% of the readingSalinity measurement range: 0.00 to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% ( 0.1%) 5.10-25.00% ( 1%)PH measurement range: 0.01-14.00phResolution: 0.01pHAccuracy: 0.05phORP measurement range: 0~ 999mVSG: Measurement range: 1000~1222Working environment: 0 to 60.0 C (32.0-140 F); Relative humidity 100%TDS coefficient: 0.4 to 1.0Temperature range: 0.1-60.0 C 32.0-140 FTemperature accuracy: 0.5 CTemperature resolution: 0.1 C/ FPower supply: 3 x1.5lr44 button battery,150mAhDisplay size: 33 * 24mmSize: 183 * 37 * 37 millimeters (7.2 * 1.5 * 1.5 inches)Weight: 105 grams (3.2 ounces)Package included:1 x Water Quality Tester4 x Correction Powder1 x English User ManualOther items not included