1. This product is an AC/DC dual-purpose oxygen pump. It adopts pure copper movement and high-quality lithium battery. The cycle life is up to 500 times. It has the characteristics of small size, low noise, large air volume and long life. It can be continuously charged when fully charged Use 24 hours.2. The internal circuit is intelligently controlled by imported single-chip microcomputer, which has the characteristics of constant voltage and constant current charging, overcharge and overdischarge protection, low power alarm, and high safety factor.3. Widely used in a variety of ornamental fish, aquariums, fish lovers, company fish tanks, and family fish for aeration, especially suitable for emergency oxygenation during power outages, as well as for field fishing and a small amount of aquatic product transportation.Instructions:1. Long press the power button (3 seconds), the blue light is on to indicate that it has been powered on, and at the same time enter the long-term oxygenation mode;2. After starting up, press the power button again (1 second) to enter the intermittent working mode (stop for 2 seconds, run for 8 seconds);3. When the battery is low, the red indicator light will flash rapidly, and the battery should be replenished in time;4. Charging method: Connect the mobile phone charger or 5V solar panel, plug it into the charging port, the red light will enter the slow flashing state ~ indicating that it is charging, and you can also take oxygen while charging.