Adjustable speed design: The plant watering device with control valve can control the drip speed. You can adjust the traffic to 3-20 days or more depending on the time you need and will never kill your plants because the water runs too fast or too slow. Easy to UseJust squeeze the drip irrigation devices, then insert it into the soil, no nail needed and no danger. Our ideal self watering system for watering the indoor flower, outdoor plant or your vegetables during the holidays. Fits most bottles: The self watering tip is suitable for bottles of many sizes, you are no longer limited to finding 1 inch inner diameter bottles, the new waterer suitable for the 0.8-1.2 inch bottle. Don't waste time finding the right bottle, most bottles operate the self-watering system. Enjoy your calling Healthier plants Enjoy your family vacation, leave your plants to me, water your plants yourself and your vegetables and make your plants thrive. Three colors: orange, blue and green. It is made of environmentally friendly PP plastic. It measures 16.5 cm long, 5.5 cm wide and 30 mm in diameter. The automatic flower watering device has good permeability, and the watering speed can be adjusted. The potted plant molding nail can be used for general plastic beverage bottles.