1,Adjustable Valve Irrigation:These automatic plant sprinkler devices with control valve can control the drip speed 0-60s/1 drip, slow release drips flow through the drip stations. self water, lasts 1-15 days or more, depending on how long you want. 2, Materials: This plastic bottle irrigation is made of ABS plastic. Good resistance to cold and heat, safe and non-toxic. The long nose cone design allows easy access to the roots. 3,Easy to Use:Drip irrigation bottle, quick installation, no need to rotate, just put it down, plant sprinkler , deliver water directly to plant roots, suitable for most plants. Easy flow control means your plants get the correct amount of water. 4,Multi-scene Application : Plastic bottle irrigation is suitable for your vegetables, indoor and outdoor gardens, hanging plants, small trees, shrubs, daily water plants, potted plants, houseplants, herbs, garden plants, hanging baskets, sinks. 5,Great for Vacation:It can take care of your plants when you are on vacation or on business. Don't worry, your plant will wither.