WORRY FREE PLANTING: Auto plant waterer is a good assistant for the gardening, you dont have to take care of your plants every day; plant watering device is perfect for planting scientifically as different plants have different absorption, self watering spikes can prevent over-watering and make plants healthier.ADJUSTABLE SWITCH: With slow release control valve switch, plant watering spikes can control the speed of flow, the drip speed is controllable from 0s/1 drip to 90s/1 drip, slow release drips lasts 1-15 days, ,It depends on the days of your vacation.EASY TO USE: Without any tedious installation, all you need to do is to cut a hole in the bottom of the bottle and tighten the drip irrigation watering devices, and then insert it into the soil, no need nail and no danger.COMPATIBLE BOTTLES: Plant watering globes are compatible with the bottles that have 1.1inch inner. Accurate amount of water, Dont become a plant killers.ENJOY YOUR VOCATION: Enjoy time with your family,your plants leave to me.self plants watering spikes prefect for your vegetables,indoor outdoor garden, water plants day-to-day,potted plants, houseplants, herbs,patio plants, hanging baskets, desk pots, hanging plants ,small tree,shrubs.Random Color