An anal vibrator is a sex toy meant for sexual stimulation of the anus. Basically, all anal vibrators have one common feature - they produce a vibrating effect in the rectum for pleasurable sensations.
As other anal toys, anal vibrators differ from other types of vibrators by having a flared base to prevent its possible loss in the rectum. The average size of anal vibrator is smaller than vibrators intended for vaginal penetration and may vary from 4-6 inches long and about 1 inch wide. As well as other vibrators designed for external and internal stimulation, anal vibrators are usually battery operated: the batteries may be inside the unit or connected by wire to a power pack.
Unlike anal dildos, such as butt plugs, anal probes and anal beads, vibrating anal toys may produce various stimulating effects: rotating, vibrating or pulsating, and can have different speed or vibration levels to regulate and adjust the vibrator to various sensations.
Read more about Anal Vibrator: Types of Anal Vibrators