Application method of four-in-one soil tester Before using,please install 9V battery,remove the probe cover,and press OFF button for about 5 seconds to close the device. 1.Lighting measurement A.Press the ON button to turn ON the instrument; B.Light sensor window aligned to the highest light source; C.the current light intensity will be displayed on the LCD screen; Note: do not block light or shadow light sensors measuring light intensity of the current environment: Low,low,low +,NOR-,NOR+,HGH-,HGH,HGH+ 2.PH range measurement A.will be on the back of the [PH /] button on the location of the PH. B.The probe is inserted vertically into the soil and needs to be tested as soon as possible. C.press the ON button to start measuring. D.the PH value of the test will be displayed on the LCD screen E.measure it several times to get the exact value you need. Note: 1.Insert the probe vertically at the edge of the plant stem in the middle. 2.Please gently push into the soil to avoid damaging the probe. 3.If the measured soil is too dry or fertile to measure the correct PH,the user can sprinkle some water and measure it again in half an hour PH measurement range :3.5-9.0 3.Water measurement A.Push back [PH /] button to B.Is inserted as vertically as possible into the soil. C.Press NO to start measuring D.Test soil moisture will be displayed on the LCD screen. Measure the soil moisture content:Dry,dry,wet,wet + 4.Temperature measurement; A.When the humidity is measured,the soil temperature will be displayed on the LCD screen at the same time. B.[/OFF] button set humidity display isor. Note: if the user does not insert the probe into the soil,the correct ambient temperature of the outer space is displayed. Why we were chosen: Large screen display data,use more intuitive and convenient. The results can be measured quickly in 3 seconds without waiting. Exquisite workmanship,humanized design,durable quality,easy to carry the whole machine. Four modes: one-button switching,sensitive sensing, Accurate measurement of different types of readings,etc. Usage: Step 1: Switch to wet/temperature/light or pH/light positions as required. Step 2: Insert probe into approximately 2-4 inches of soil. Step 3: Check the humidity /pH/ light/temperature level in the dial after 3 seconds. Step 4: Remove the probe from the soil and wipe it clean after each use. Packaging includes:1 x soil meters Special Tips: Please read these before using Not suitable for liquids:Don't use it to test any kind of liquid.It can only be used to test soil. Need 9V battery:After using for a period of time,the screen only shows a green screen without displaying numbers,which means that the battery is dead. Water very dry land first:When the soil is too dry,please wet the soil first and then test it. Wait for a while:If the soil is too dry and fertile,sprinkle some water and test again after half an hour.