18" Super Stun Baton repels attacking animals and humans. The baton activates 120,000 volts of electricity to stun but not harm attacking animals or humans. When activated, an arc of electricity snaps across two metal posts, (?????) warning and repelling the attacker. The baton comes with a wrist strap; uses two 9-volt batteries (not included). *Legal in most U.S. states as a self defense device.