SONKIR Soil pH Meter, MS02 3-in-1 Soil Moisture/Light/pH Tester Gardening Tool K. Box was only open for photographs. Easy to use - there's three in one moisture meter with light and pH test function don't need batteries and you can use it indoor or outdoor period insert probe into soil around 2-4 in then toggle switch to tester what you want to measure Moisture range 1-10, 1-3 dry, 4-7 normal, 8-10 wet, relative light - 0 - 200 lux, 0 - 200 low, 200-500 low plus, 500 - 1,000 normal, 1000 - 2,000 high, PH range - 3.5 - 8 ph, 3.5 - 6.5 acid, 7-8 alkaline Extremely practical and easy to use! No need for batteries or preparation you simply plug our soil tester in the soil area you want to check and instantly get an accurate and precise reading Can measure soil moisture / pH degree / the intensity of sunlight required for plant photosynthesis