Easy to Test & Get Accurate Levels with ph / TDS Meter Step 1: Remove the protective cap. Step 2: Rinse the electrode with distilled water, and dry it. Step 3: Press "On/Off?. Step 4: Immerse the ph / TDS meter electrode in the solution to be tested. (Kindly Note: Can not be over the immersion line; The ph level is constantly changing if the meter electrode stay in the air. ) Step 5: Stir gently and wait 25-30s till the reading stabilized. Step 6: After tested, clear the electrode with pure water, turn off the meter by press "On/Off?. Step 7: Always replace the protective cap after use.How To Use 3-in-1 Soil Meter Step 1: Push the switch to random position such as wet / pH / light. Step 2: Stick the probes into the soil about 4-6 inches. (about 2/3 of the probes.) Step 3: Adjust the position of the probes until the pointer on the dial swing slightly. Step 4: After 10 minutes, the dial will show wet / pH / light level. Step 5: Remove probes from soil and wipe clean after use.Kindly Reminder 1, Please recalibrate, if the ph / TDS tester was used / lay aside long time or replace battery. 2, Please don?t forget to wipe the ph / TDS tester with a clean and soft cloth when you have done before capping it again. 3, Be careful with the glass probe since it may be a little fragile when you use. 4, Please DO NOT use the soil meter to test any liquids directly such as pure water, lemon juice, vinegar and so on. This soil meter CAN ONLY be used in soil. 5, Please DO NOT insert the soil meter into very hard soil or touch hard objects, which is very easy to damage the probes. 6, Please DO NOT leave the probes of the soil meter inserted in soil longer than measurement time.Package Includes 1* pH Tester 1* TDS Meter 6* pH Buffer Powder 1*Soil TesterProduct Description