is this laser light legal ?

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I think the highest legal output with a normal beam to operate without a permit in the US is under 5mW. The "Fat Beam" 10mW can be higher because the beam is dispersed with optics so the focal point is larger.
 
You could use them, but you would require a variance for each show you do. They are extremely brighter than anything Chauvet and ADJ have but the risks and liabilities are too big to get into.
 
Also the lasers have to be FDA certified for use in the US. Being that those units are from China probably not. Also IF these aren't certified and you use them your insurance will go out the window.

Ben from Northern Lights could probably tell you about the legalities.