A taser is a “less-lethal” weapon that uses a high‑voltage, low‑current electric shock to briefly shut down a person’s ability to move, usually for a few seconds.

What a taser actually does

  • Fires two small barbed darts attached to thin wires, powered by compressed gas or nitrogen.
  • Sends short electrical pulses between the darts that disrupt signals in nerves and muscles, causing neuromuscular incapacitation : the person usually stiffens, falls, and cannot control their voluntary movements while the shock is active.
  • The shock typically lasts a set cycle of a few seconds, and the loss of control normally stops once the current stops, although pain, confusion, and muscle soreness can continue afterward.

How it works in simple terms

  • The taser needs both darts to stick at least a few centimeters apart on the body or clothing to complete an electrical circuit.
  • Once the circuit is made, the device sends rapid pulses that tell the muscles “contract now” over and over, overwhelming whatever the brain is trying to tell them.
  • That is why someone being tased often locks up and falls, instead of just feeling a small shock and running away.

“Less‑lethal” doesn’t mean harmless

  • Tasers are designed as a less‑lethal alternative to things like firearms or blunt‑force strikes, and they have reduced injuries in some police forces.
  • However, serious injury and even death are possible, especially in people with heart or health problems, or when used repeatedly, at close range to the chest, or alongside other stressors (restraint, drugs, intense struggle).
  • Because of this, many police guidelines treat tasers as a significant use of force that should follow strict training and policy.

Close‑contact mode vs probes

  • Standard use: firing probes from a distance (often up to about 7–11 meters depending on model) to incapacitate a person.
  • “Drive‑stun” mode: pressing the device directly against the body without firing probes; this usually causes intense localized pain but less full‑body muscle lock‑up.
  • In both modes, the electrical effect only continues while the trigger is held for a cycle; releasing it stops the pulses.

Safety, law, and common misconceptions

  • Touching someone who is being tased does not usually give another person the same shock, because the current mostly travels between the two darts.
  • Many regions regulate or restrict civilian taser possession because of the risks; laws vary widely by country and state.
  • Even though they are common in videos and memes now, tasers are not toys; misuse can be legally treated as assault or worse, and ethically they should only be used to prevent serious harm, not to scare, punish, or prank.

TL;DR: A taser fires two wired darts that send timed electrical pulses through the body, briefly overriding muscle control so a person cannot move, marketed as “less‑lethal” but still capable of causing serious harm or death in some situations.

Information gathered from public forums or data available on the internet and portrayed here.