Description: It can float in water and is suitable for adding oxygen to fish and seafood in small aquariums, ponds and outdoor fishing. The product has a built-in 2200mAh lithium battery to store excess power so it can keep working at night. Just put the solar panel in a sunny place and in the water, the product will start automatically. Product Feature: [Solar Power] Eco-friendly, portable, easy to install, no wiring required, no operating cost and maintenance free. Solar power is also safer for your children. [Built-in storage battery] The built-in 3.7V2200mAh lithium battery is used to store power, so the oxygen pump can also work at night. [Quiet] Stable and quiet oxygen pump, the volume is less than 60 decibels, and the airflow is 0.8 liters per minute, this which is suitable for oxygenating various types of small containers. [Working mode] The product is an intermittent working mode, working for 10 seconds and stopping for 10 seconds Product parameters: Solar panel: 6V/2.5W, diameter 180mm Battery: 18650 3.7V2200mAH lithium battery Volume: less than 60 decibels< /p> Gas volume: 0.8 L/min Charging time: solar charging about 5-6 hours Tracheal length: 1.5 meters Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual item received shall prevail.