Automatic Watering Set, 18 Pieces Adjustable Irrigation SpikesAutomatic irrigation: it works automatically, supply water directly to the plant roots, self-watering system eliminates the worry about forgetting irrigation or unattended. You don't have to water it every day.Adjustable flow rate: the valve can control the drip speed 0-60 s/1 drip, slow draining lasts 1-15 days. Ideal for short business trips or short holidays.Easy to install: without tedious installation, you just need to cut a hole in the bottom of the bottle and tighten the drip irrigation devices and then insert into the ground without a nail or a danger.Ideal for holidays: whether your plants are indoors or outdoors or in the garden, at home or in the office. It can care for your plants when you are on holiday or business. Don't worry, your plant will be spoiled.Suitable for more bottles: for most bottle sizes. Don't waste time finding the right bottle. With each bottle, the automatic watering system can work.