You are not going to like my opinion, but you said you wanted them, so...

You bought junk. This is a cheap red dot, dressed up in an outer shell to look like an Eotech. It is not an Eotech "clone" as it is a simple reflex sight, not a holographic display like Eotech.

If you wanted a cheap optic, you should have posted and asked here. We could have given you some advice on known good yet inexpensive red dots.