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 can control the speed, and the continuous dripping time is 3-20 days. When traveling or on vacation, there is no need to worry about plants withering. Upgraded Design- Compared with other ordinary products, our upgraded watering spikes do not require poking holes in the bottom of the bottle when using. It also has an improved appearance and comes in blue, orange, and green. The most important feature is that it will not stop watering due to changes in water pressure. Eco-Friendly and Easy to Use- Plant watering spikes are made of high-quality PP material, non-toxic, odorless, and non-fading. Without any complicated installation, you simply insert these automatic watering units into the soil. Compatible with 90% of Bottles- Self-watering spikes fit 90% of bottles, so you don't have to waste time searching for a compatible bottle. Suitable for Pepsi bottles, Coca-Cola bottles, and other bottles with an inner diameter of 1.1 inches. Multi-Scene Application- Plant self-watering device can be used in indoor and outdoor gardens, for aquatic plants, potted plants, indoor plants, herbs, garden plants, hanging baskets, flower pots, hanging plants, small trees, and shrubs.