Tasers: How they work

The video tutorial explains a device used by police worldwide. It describes the mechanism where a firing pin releases compressed gas, propelling barbed projectiles connected by copper wires to deliver an electrical charge. The device uses a rechargeable battery to deliver 50,000 volts, disrupting electromuscular control. A laser sight aids in aiming, and the device is effective up to 6.4 meters. The charge can incapacitate an aggressor for five seconds.

How does the aiming mechanism work in this device?

What is the purpose of the five-second charge in the device?