A total of 12 automatic drip irrigators Adjustable Flow Rate- The water flow rate can be adjusted by adjusting the control valve. Our automatic plant watering device controls the speed, with continuous dripping for 3 to 20 days. Ideal for use during travel or vacation without worrying about plants drying out. New Upgraded Design- Unlike ordinary products, our upgraded watering spikes do not require puncturing the bottle bottom. Features an improved appearance and comes in blue, orange, and green. Designed to provide consistent watering regardless of water pressure. Eco-Friendly and Easy to Use- Made from high-quality PP material, these plant watering spikes are non-toxic, odorless, and fade-resistant. No complicated setupsimply insert the watering spikes into the soil. Compatible with 90% of Bottles- Self-watering spikes fit most standard bottles, eliminating the need to search for specific types. Works with common bottles such as Pepsi and Coca-Cola bottles with an inner diameter of 1.1 inches. Multi-Scene Application- Suitable for indoor and outdoor gardens, potted plants, houseplants, herbs, garden beds, hanging baskets, flower pots, hanging plants, small trees, and shrubs.