The Aneros vibrator in the Vice is nice, but the frequency is too low. I recommend you work with http://prostatemate.com/ to develop a 3-mode sonic massager/vibrator for the Vice. The effect of their sonic massager is truly remarkable, but it lacks the ability to accurately target the prostate. Inserted in the Vice, it hits just the right spot, but holding it inside the Vice is a chore and gives leverage that can be a problem. An insertable sonic device the same size as the Aneros vibrator would offer the best of both worlds.