A $2000 piece of hiking gear.
The Wildlife TASER electronic control device is a revolutionary new multi-shot ECD that can engage multiple targets, and deliver a calibrated Neuro Muscular Incapacitation (NMI) pulse from up to 35 feet away.
The Range Adjusted Dual Laser System increases effectiveness, while providing a more humane means of animal control for wildlife. These devices have been proven effective for wildlife and are available today for wildlife managers, field biologists and zoo caretakers.
People for the Ethical Treatment of Animals (PETA):
… calls the X3W inhumane
Tasers cause uncontrollable muscle contractions and overwhelming pain. Humans and animals on the receiving end have died as a result of the shock. For these reasons, the National Animal Control Association and the American Veterinary Medical Association both recommend against their use. Aggressive methods should be explored only if one’s life is truly in danger.
In extreme nuisance wildlife cases, large wild animals (without young) can be live-trapped and relocated. …
read more – ABC 15
besthike.com 
I have been reading articles about Tasers and have seen some questions about the effectiveness of C2 Tasers on bears. Some hikers say that it is usually windy in bear country and are afraid that the sprays available won’t be effective from a distance. It is good to know that there is a Taser for large animals. I am going to ask my supplier about this.
PETA- I’m sure that most hikers would only use this if absolutely necessary. Most hikers and campers respect the environment and wildlife. Of course, there are always exceptions as with anything else.