Powder spray gun has a circuit which generates 100 KV and releases the same at the gun tip. In the event of high voltage failure, all you need to do is-pull the barrel out and change the power cartridge. The power cartridge has the patented (US Patent- 5678770) Infiniti™ technology which protects the gun barrel from any damage. Other guns available in market do not have the Infiniti™ feature. In the event of high voltage failure, one needs to buy the new gun or send the damaged gun to the manufacturer for expensive repair work.