Able to deliver an 800,000-volt shock and an ear-piercing 130-decidbel alarm, the Telescopic Stun Gun With Siren is packed with power to protect, but the ability to expand from 12 inches all the way up to almost two feet is its outstanding virtue, since anyone under attack would prefer to stay as far away as possible from an assailant. The only drawback: size. Supposedly, it's small enough to fit in your purse, but unless your wallet travels in a duffle bag, we're thinking that might be a little hyperbolic. Just note, if your purse doesn't provide space or you're expecting a duel, the stun gun does come with a holster.

Telescopic Stun Gun with Siren., via The Red Ferret Journal