Negative ion generator.
R.H.:
This one isn't an ion generator.
Toy Ray Gun?
This answer is correct, it's one of the better ray guns that I've seen. A
full photo of it can be seen on the answer page:
http://pzphotosan79emc.blogspot.com/
I opened the tank on top of it and didn't see a connection to the barrel so
I didn't think it could shoot water, but I'm going to have to take a closer
look at it in a few weeks since elsewhere on the web someone said that it
could.
Rob