Visible Water Level: Made of high-quality plastic, safe, healthy, and durable. Visible water level, easy to observe at any time, flexible irrigation. Plant Watering Indicator: If there is no water in the pot, the buoy of the water level indicator is at the bottom. With this in mind, pull the water level and water plants through the hole. Easy to Use: No batteries or electricity required, just plug in and use. The plant water level indicator is easy to use. As long as it is inserted into the flowerpot, it helps you monitor the soil moisture and can remind you to add water. The plant water level indicator is suitable for all types of flower pots and is a garden tool for indoor and outdoor potted plants.