This a device on amazon which indicated acidity of soil. It also has 2 more indicators i,e light and moisture. As per instructions insert 3/4 of these needles inside soil and keep their for 1 minute. When i inserted same time needle moved for showing the result. Still i waited for 1 minute and after that result was below 7 means soil was acidic. There are 3 graphs inside screen showing three different results. Have u used this device and what were your outcomes do let me know. Happy Gardening soil ph,how to test soil ph,soil ph test,how to test soil ph at home,soil test,soil ph meter,soil ph tester,testing soil ph,how to check soil ph,how to check soil ph at home,how to check soil ph level at home,home soil test,soil ph explained,soil,soil ph test at home,soil ph level,testing soil ph at home,how to test your soil ph,soil ph testing,how to test your soil ph at home,how to test soil ph levels at home,adjusting soil ph,check soil ph