Most vibrators are battery operated. But there are also electric vibrators, the body of the vibrator being attached to a plug-in cord. They are often marketed as ‘(personal) massagers’.
Advantages
The big advantage of an electric vibrator is that you never have to bother about batteries. You avoid the frustration of them running out the moment you are ready to climax.
They are more powerful: the vibration is more intense than with battery operated vibrators.
They normally have various speeds, enabling you to find out what you like best.
They don’t break down easily. They are well made, with long life expectancy.

Disadvantages:
They make more noise.
You need to have an electric point. When you use it during lovemaking the cord can make moving around more difficult.
They are bigger than the battery operated vibrators.
There are no low-priced models. The cheapest electric vibrator is about 40 euro.