Black USB socket Note: Dry burning is best avoided. 【Improving the aquatic environment】: Simply put the water pump into the water tank and the water will start flowing, providing living water for underwater creatures. 【Convenient USB Socket】: No longer a traditional socket, but a USB socket. Unexpectedly triggers more interrupts. You can still charge the water pump with an external battery. 【Increase and develop nitrifying bacteria】: The water pump can slightly increase dissolved oxygen in water and cultivate nitrifying bacteria, which helps keep water clean. Can be used as aquarium pump, water pump fountain, fish pond pump, bird bath pump, aquarium pump, small pond pump, garden decoration, oxygen circulation water, etc.