1. Product Introduction 1. This product is an AC/DC dual-purpose aerator pump, adopts pure copper core, high-quality lithium battery, cycle life up to 500 times, has the characteristics of small size, low noise, large air volume, long life, full charge can be continuous Use for 20 hours. 2. The internal circuit adopts imported single-chip microcomputer intelligent control, which has the characteristics of constant voltage and constant current charging, overcharge and overdischarge protection, low power alarm and high safety factor. 3. It is widely used for aeration of various ornamental fish, aquariums, fish hobbyists, company aquariums and family fish. It is especially suitable for emergency oxygenation during power outages, as well as wild fishing and transportation of small aquatic products. 2. Specifications 1. Solar panel: 5V 290MA 2. Battery: 18650 lithium battery 3. Aeration pump: DC 1.8V 150MA micro air pump Noise: 50dB Minimum air flow: 0.3L/min Air nozzle specification: 4.4MM (the external air nozzle of the product is 5.1MM) 4. Product working power range: 3.2V4.2V 90MA Low battery indication voltage (flashing green): 3.3V Full power indication voltage (red light on): 4.0V Charging protection voltage: 4.2V 5. Working time: about 20 hours 6. Charging method: solar; 5V 1A power adapter 3. Instructions for use: Connect the bubble stone to the exhaust hole and put it in the water that needs aeration. The solar cell faces the sun, and there is no obstruction between the solar cell and the sun. Turn the switch to ON to turn on the oxygen pump and start working. When the sunlight is strong, the solar battery can charge the excess energy into the internal battery for storage. When there is no sunlight, the battery will provide power to pump oxygen. This product can also charge the battery through a 5V 1A USB power supply. Four, pay attention to things: 1. This product is an electronic product, the whole machine cannot be placed in water, and the diversion hole cannot be blocked. 2. After replacing the battery, the product needs to activate the circuit before it can be used normally; The activation method is to place the solar battery in the sun for 5 seconds or input 5V voltage from the USB charging port for 5 seconds. 3. This product is a solar product, and the charging speed is related to the intensity of sunlight. Regular cleaning of dirt on the solar cell can improve the charging efficiency.