[Adjustable flow] The plant water dispenser valve controls the dripping speed from 0 to 60 seconds per drop. Slow dripping lasts 1 to 15 days, allowing you to adjust the water flow according to your system's needs. Ideal for short-term trips or vacations. [Automatic watering] The automatic watering system delivers water directly to plant roots. The U-shaped switch design helps control water flow and prevents leaks. This irrigation system helps prevent under or over-watering, reducing the need for daily maintenance. [Easy to use] No tools required for installation. Simply make a few holes in the bottom of a bottle or cut the neck to allow air circulation. The required water amount varies depending on plant type, as each plant has unique needs. [Compatibility] Fits most bottles with an inner diameter of 3.8 cm, such as standard soda bottles. [Indoor and outdoor use] Suitable for vegetables, indoor and outdoor gardens, hanging plants, small trees, shrubs, aquatic plants, potted plants, houseplants, herbs, garden plants, and hanging baskets. Size: 13.5 x 3.5 cm Package quantity: 12 pieces