How to use: As the soil dries, the ceramic cone gradually delivers water to the surrounding soil; This creates a vacuum inside the cone that draws water from the nearby water container; When the soil is sufficiently moist, the watering spike will stop flowing water; Note: close the lid with full water in the spikes, the formation of a vacuum in the spikes. Useful tools: the self-draining probes are simple and effective ways to water your plants when you are on vacation, business trip or forget to water them. Usage: 10-pack watering spikes are suitable for most automatic garden watering devices; They are good for seeding, planting without pollution; And they will slowly release water into the pot according to the needs of the plants. Dimensions: the connecting pipe is 78 cm long, the root gets water directly by itself to achieve drip irrigation. Friendly reminder: the watering spikes are suitable for watering any indoor plants; Keep the sink and the flower pot at the same level; And the sink is at a higher level, which will speed up the process of drip irrigation.