I’m no genius, but if your fireworks say this…
…then you likely could get hurt. So please PLEASE be careful this 4th of July holiday.
Also, fireworks are expensive. Leave it to the pros.
Here’s a quick news story with my friend Euclid Fire Capt Jay Northup on the dangers of fireworks who was injured a few months ago in NE Ohio. (click on the picture)

Fire Captain Jay Northup suffered a severe head injury, two ruptured eardrums, second-degree burns, and multiple bruises and cuts requiring 35 stitches after an accident involving fireworks. / AMERICAN ACADEMY OF OPHTHALMOLOGY
Again, I would highly recommend that you leave the fireworks to the pros.