【ADJUSTABLE VALVE】The plant watering device with control valve switch can control the drip to meet your needs. Provide different amounts of water for different plants and flowers. Make your plants healthier. 【IRRIGATION DRIPPERS SUITABLE FOR ALL BOTTLES】Upgraded self-watering spike fits all normal size bottles in daily life, from 0, 8 to 1.2 inches. Don't waste time to find the right bottle, most of the bottles operate the self-watering system. 【HIGH QUALITY AND ECONOMICAL】Made of high quality PP plastic, each watering tips automatic is durable and solid. They can work for more than a year. Efficiently recycling plastic bottles and water, they reduce resource waste and protect our environment. 【WILD APPLICATION】This self-watering spike system can be used indoors or outdoors. outdoors, at home or in the office. They are also suitable for potted plants, houseplants, patio plants, hanging baskets, patio pots, hanging plants, etc. 【WORRY-FREE PLANTING】 You don't have to no need to water your plant every day. The improved design of the plant watering devices can ensure that the water pressure will not be affected by the water level descended, and the bottled water will be completely exhausted.