Features: Automatic Watering Function: This plant self watering device can water plant automatically for 3-5 days, which is very suitable for busy workdays or holidays. When plant need water to moisten them for several days, water gradually seeps through the liberated clay. Material: The plant self watering device is handcrafted from red ceramic. The porous red ceramic automatically absorbs water or nutrient solution to keep the plant roots moist. Even when exposed to sunlight for a long time, its shape and color will not change. Size: 16.2x8.2cm/6.38x3.23inch. Material: Red Ceramic