Two Modes: Built-in 2200mAh battery, low speed to work 16 hours, intermittent low speed to work 32 hours. Easy to Install: The solar aerator pump has a ground plug, just stick it into the ground. Adjustable Angle: The angle of the solar panel can be adjusted to receive enough sunlight. Solar Powered: Using solar energy makes it environmentally friendly and maintenance-free, and solar energy is much safer for your child. Widely Applicable: 0.8L/min air volume, suitable for many types of containers, such as small and medium-sized ponds, outdoor aquariums or water tanks, etc.