Lifelike hand-painted polyresin songbird softly chirps its own authentic song when your plant needs watering. Looking for a great idea to assist you in the care and healthful growth of plants indoors or out? Plant Pal accurately measures moisture at the root level to prevent under- or over-watering. Position the 6-inch moisture-sensing probe into the soil for accurate moisture measurements. Light sensor deactivates bird sound when room is dark. Just remember, when your plants need watering, our little birdie tells you!