It provides vibration stimulation to the perineal and the testicles along with the anus. It has a cock ring that fits. It wasn't too small nor too big. Just right. The plug itself has the ability to thrust rubbing the prostate. 

Super fun toy for any collection, beginner or otherwise. The suction and vibration features are strong, it’s easy to charge and clean, and the silicone is very soft and has a realistic feel.