1, Irrigation Adjustable Valve: These automatic plants sprinkler devices with control valve can control drip speed 0-60s/1 drip, slow release drips flow in auto water stations, last 1-15 days or more , depending on the desired duration. 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 root access. 3, Easy to Use: Bottle drip irrigation, quick setup, no need to rotate, just lay it down, plant sprinkler, deliver water directly to plant roots, suitable for most plants. Easy flow control means your plants receive 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, indoor plants, herbs, garden plants, hanging baskets, sinks. 5, Ideal for Holidays: It can take care of your plants when you are on vacation or on business. Don't worry, your plant will wither.