What does "three in and three out" mean in fortune telling?

What does the fortune teller mean by "three in and three out"? Three inputs and three outputs: the input voltage of ups is 380 V, and the output is also 380 V..

Three inputs and three outputs: the input voltage of ups is 380v and the output is 220v V..

380v refers to the voltage between three live wires, also known as line voltage.

220v means that the voltage between live wire and neutral wire is called phase voltage.

Ups has online standby interaction.

There are too many details, so it will be all right at once. That's about it. You can download some product information from ups official website.