Egg vibrators are discreet egg or teardrop-shaped vibrators that are usually wired to a remote control. Because of their relatively small size, they can deliver more focused and powerful vibrations than other vibrators. They are often sold in the same category as bullet vibrators, which tend to be smaller and slimmer.
The advantage to these vibrators is that they're discreet and portable. Many also pack the same amount of vibration - and other high end features such as waterproofing - as more expensive sex toys.