This new designed automatic watering device is great for potted plants, with adjustable drip irrigation valve, you can control the drip rate and avoiding over-watering. Removable for easy storage. Easy to install, no additional tools are required, just drill holes at the bottom of the bottle or cut the tail of the bottle to keep air flowing. You can finely control the water flow rate for different days of vacation. Providing different amounts of water for different plants and flowers. No worries about your plants while on vacation with your family. The watering spikes are suitable for the bottles of 1.1inches or 2.8cm inner diameter, and this bevel design is suitable for most bottle mouths. Anti-fall bracket to prevent being blown down by wind. Whether it is at home, office potted plants, terrace plants, hanging baskets, or in the garden, can be used to ensure that plants always maintain sufficient moisture.