[Adjustable Valve]: Control the water flow with ease. This plant watering device features an adjustable valve to regulate dripping speed from 0 to 60 seconds per drip, providing consistent moisture for 1 to 15 days. Simply adjust the valve to suit your plant's needs—no complicated setup required. Helps conserve water and save time. [Simple and Convenient]: Tool-free installation. Just drill holes in the bottle bottom or cut the bottle tip to allow proper air circulation. Easy to assemble and use. [Precise Water Volume]: Deliver the right amount of water for various plants and flowers. Avoid common watering issues such as overwatering or underwatering, which can lead to yellowing leaves or plant stress. Promotes healthy growth. [Compatible with Common Bottles]: Fits most standard plastic bottles with an inner diameter of approximately 1.1 inches, including bottles from Dr. Pepper, Pepsi, Coca-Cola, Lipton, Diet Coke, Aquafina, and similar brands. (Bottle not included.) [Multi-Scene Application]: Ideal for use with vegetables, potted plants, indoor plants, patio plants, herbs, hanging baskets, desktop pots, hanging plants, outdoor gardens, small trees, and shrubs. Specifications: 30 Pieces