An electro-wand that is used as part of electrostimulation. They typically look like a magic wand that Harry Potter would use, except they're used to send shocks to the body. Zappers are frequently used as part of D/S play in which the dominant shocks the subs. Though it sounds scary, zappers feel like a little sting, but it is still 100-percent OK if they're on your hard-no (see hard limit and soft limit) limit list.