It includes two rings as well as two bullet vibrators. The vibrations are not extremely strong but they get the job done. This toy provides a nice combination of sensations for both you & your husband. We enjoyed playing with our Tri-O and will use it again from time to time. The thing I like the most is that because the toy is worn by the man it enables you to easily integrate some vibrating sensation into your lovemaking without a lot of trouble. Easy and fun!