These are disguised self-defense weapons that look completely innocent and inoffensive.
They hang from your belt or purse strap for easy access without anyone knowing you're armed.

Mobile Phones are carried by almost everyone these days. No one will think that yours is actually a highly effective non lethal self defense weapon with a surprise shocking effect.
They work like other stun guns.

You press the end of the device into the person and press the trigger. This dumps the electrical charge into their body and overworks their muscle group. The longer you hold it on the person, the more effective the shock effect