The Zapper V2 turned my buttwings into prismatic slime. (LOL weird sentence.)

I thought that it was a battle weapon.. But it says Use, not Equip. What does it do?

When used, It may give your pet 1 Additional maximum health point or it may do nothing :P

Ooh. Thank you, I will keep it or sell it. :P 1 Point doesn't matter to me.