ℜTravel Helper: Automatic Plant Waterer is the perfect choice for any indoor or outdoor plant. Especially for those who travel and want to make sure their plants are properly watered. Large planters will require two or more plant fountains. ℜAdjustable Flow: The flow rate can be controlled. The plant watering device with control valve can control the dripping of 0-60s / 1 drip, and the sustained release drip lasts for 1-15 days. ℜConvenient to Use: Recycle unused plastics bottles and pour them i