Features: 1Equipped with an LCD display which can visually display the PH measurement results. 2The pH measurement range is 0.014.00pH with high accuracy and small error. 3Suitable for aquarium fisheries swimming pools school laboratories food and beverages etc. 4Small and portable it can be used to check water quality with sensitive response and convenient operation. 5With calibration solution please calibrate with solution before use to make sure accurate measurement. Specification: Condition: 100% Brand NewItem Type: PH TesterMaterial: PVCMeasuring PH Range: 0.0-14.00pHResolution: 0.1pHAccuracy: 0.01pHTemperature Compensation: 0-50Working Temperature: 0-50Battery: 4 x 1.5V LR44 Button Battery (Battery Not Included)Weight: Approx. 135g / 4.8ozOperation Steps:Step 1. Remove the protective cover.Step 2. First clean the electrode with distilled water and then absorb the electrode with filter paper.Step 3. Turn on the PH via the ON-OFF switch located on the top of the battery box.Step 4. Immerse the pH meter electrode in the solution until it is immersed in the liquid level. If there is no immersion liquid immerse above the display liquid level.Step 5. Stir gently and wait for the reading to stabilize.Step 6. After use turn off the PH clean the electrode with distilled water and cover the protective cap. Package List: 1 x PH Tester (Battery Not Included)2 x Calibration Solution (4.01 and 6.86)1 x Chinese Manual1 x Screwdriver Note: 1.Pleaseallow01incherrorduetomanualmeasurement.Thanksforyourunderstanding.2.Monitorsarenotcalibratedsameitemcolordisplayedinphotosmaybeshowingslightlydifferentfromtherealobject.Pleasetaketherealoneasstandard.3.Pleasecalibratewithsolutionbeforeuse.4.Pleasenotethatthenewtypeandoldtypeofthisproductwillbesentrandomlyandmakesureyouwillnotmindbeforeording.