[Solar Power Supply] Environmentally friendly, portable, easy to install, no wiring, no operating costs, and maintenance-free. Solar energy provides clean power for everyday use. [Built-in Storage Battery] Features a built-in 3.7V 2200mAh lithium battery pack to store power, allowing the oxygen pump to operate at night. [Mute Operation] Equipped with a stable and quiet oxygen pump with noise under 60 decibels and an air output of 0.8 liters per minute. Suitable for oxygenation in various small containers. [Working Mode] Operates in intermittent mode: runs for 10 seconds and pauses for 10 seconds. Connect the bubble stone to the air outlet and submerge it in water requiring oxygenation. Place the solar panel in direct sunlight with no obstructions for automatic operation. Precautions: 1. This is an electronic device. The solar panel has an air pump inlet on the sunlight-receiving surface. This part must not be submerged in water, and the vent hole must remain unobstructed. 2. As a solar-powered product, charging speed depends on sunlight intensity. Regularly clean the solar panel surface and adjust its angle to optimize charging efficiency. Solar Panel: 2.5W, 6V PET Battery: 18650 3.7V 2200mAh lithium battery pack Rated Voltage: 3V DC Noise Level: under 60 decibels Air Output: 0.8L/min Charging Time: 5–6 hours Air Tube Length: 150cm Color: Blue black Material: ABS Dimensions: 19 x 19 x 6cm Package Contents: 1 x Solar Aerator Pump 1 x Accessory Bag 1 x Bubble Stone 1 x Air Tube Note: The package includes only the items listed above. Other items are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1–3cm.