(VP0198) Household oxygenator for fish farming, small oxygenation pump, USB fish tank oxygen pump, rechargeable oxygenator, oxygenation oxygen pump, fish tank aerator, rechargeable dual-purpose oxygenation pump, AC and DC, AC oxygenation pump, DC

AC and DC dual use
Automatically switches to lithium battery power supply when power fails
When plugged in and working, it can be charged while working. After it is fully charged, it will only work without charging. After the power is cut off, it will automatically switch to the lithium battery to continue working, ensuring that the fish have sufficient oxygen supply anytime and anywhere.