What is the switch "-"&"="mean?

Q: What is the switch "-"&"="mean?

A: 1. the switch of above"=" is: power saved on. It will scan the load which is more than 25w within 4 seconds, then start; the current draw of power save on is 1/3 of power save off. 

2. the switch of below"_" is: power saved off. When on load, it can be instantly started.