8 Pack Indoor Plant Water Dispenser, Self Watering Device for Your Houseplant. Made of ceramic and plastic, convenient, practical and easy to use. The higher the water level in the water tank, the faster the water will drain. Must be adjusted to the correct level. Please follow the instructions before use. Seal the lid with full water in the batteries, creating a vacuum in the batteries. Then insert the probes into the soil of your potted plants and place the ends of the tubes in a nearby water tank. Can the plant be watered depending on the moisture in the soil? As the soil dries, the ceramic cone gradually releases water into the surrounding soil. Ideal for houseplants, potted plants, garden plants, hanging baskets and outdoor gardens when you are away for weeks or don't have time to care for your plants.