Always know when it is time to water your plants with the PlantRay Smart Plant Watering Reminder. While your plant can’t tell you when it’s thirsty, this smart device can. Featuring a simple design, PlantRay measures the moisture of your plants and reminds you when it’s the ideal time to water them. Suitable for home or office use, PlantRay prevents you from forgetting to water your plants or overwatering them. When the soil reaches a certain dry level, the device warns you that the plants need to be watered. If PlantRay is blinking red, you know it’s time to water. Likewise, it turns back to blue when the plant gets enough water. The device offers four programs, depending on your type of plant. Simply insert the battery, choose the program by pressing the button and put PlantRay into the soil up to the mark.