The dual outlets means that you can aerate your pond in two different places the pond aerator works without energy storage in direct operation the more the sun shines the more air is pumped into the pond the product is very easy to use it is powered by a 25 w solar panel which means no additional power supply is required and the low voltage makes it safe you will receive a ready to use solar panel air pump 2 x 2 m air pipe and 2 fizzing stones the solar panel can be turned to c