It's small and light About like a typical flashlight.
https://www.pepperball.com/pdf/Flash_spec_sheet.pdf
As far as pepper spray, FOX all the way, and none of that dye crap either, You'll know who you hit by the mucus running out of him. 5.3 Million SHU, I've learned to trust it.
I let my wife spray me with some junk she bought at some store. It was mildly irritating but not near incapacitating. Saber I think.