[Solar power supply] Environmentally friendly, portable, easy to install, no wiring, no operating costs, and maintenance-free. Solar energy is also safer for your children. [Built-in storage battery] Built-in 3.7V 2200mAh lithium battery pack is used to store power, so the oxygen pump can also work at night. [Mute] The stable and silent oxygen pump, the volume is less than 60 decibels, and the air output is 0.8 liters/min. It is suitable for oxygenation in many types of small containers. [Working Mode] The product is in intermittent working mode, working for 10 seconds and stopping for 10 seconds. Connect the bubble stone to the vent hole and put it into the water that needs to be oxygenated. The solar panel faces the sun, and there is no obstruction between the solar panel and the sun, and the product will start to work! Precautions: 1. This product is an electronic product. The solar panel has an air pump inlet on the sunlight-receiving surface. This part must not be immersed in water, and the diversion hole must not be blocked. 2. This product is a solar product, and the charging speed is related to the intensity of the sun. Please regularly clean the dirt on the solar cell and adjust the angle of the solar panel to improve the charging efficiency Solar panel: 2.5W, 6V PET Battery: 18650 3.7V 2200mAH lithium battery battery pack Product rated voltage: 3V DC Volume: less than 60 decibels Air volume: 0.8L/min Charging time: 5-6 hours Trachea length: 150cm color:Blue black Material:ABS size:19 x 19 x 6cm Package Contents: 1 x Solar aerator pump 1 x Accessory bag 1 x Bubble stone 1 x Trachea Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.