This is a great product for monitoring your moisture levels in your pots outdoors or indoors. Never have to guest or pickup a pot again to see if your plants need water, they take the guess work out. I find them very helpful, my plants in 5 gal fibric pots increase water intake as the plants advance into flower, the water uptake is can be as much as a gallon of water per day in the last few weeks of flower, these are great tools to ensure your plants are receiving the H2o they need.