So the Screaming O Ling-O vibrating tongue ring could also be used as a cock ring for a smaller toy, but I don't think I'd recommend use on a real penis. It might be too tight. But of course, you don't have to use it on only the tongue. I used this on my girlfriend with my finger, anyway, because it felt pretty good to her. Sometimes called "Tingling Tongue Action For The Cunning-Linguist," the Screaming O Ling-O brings extra excitement to any bedroom by adding a vibrating tongue twist to oral action for him or her. The Ling O vibrating tongue ring is designed to fit any size or shape the tongue and stays in place with under tongue snug knobs, a ridged band and flat surface to keep the tongue from curling . Fit the ring below at the base of the tongue, with bullet at the top of the tongue. Press button to turn on. The battery life is 40+ minutes. Disposable fun!

You can easily turn it on and off by pushing a button on it, it's waterproof (obviously, since it's for oral sex use), it fits any sized tongue as it is stretchy (It's a gel band), it holds a form-fitting tongue design, and it has a super-powered motor. It also has under-tongue snug knobs, which keep it on one's tongue as a matter of friction works. The contoured shape should stay in place, while it's super-soft safe SEBS food-grade silicone material is waterproof, comfortable, and stretchy, as said. This is a pretty nice product for what it's for. Plus, batteries are indeed included. But sadly, when it's done, you'll want to get a new one, unless you want to find a product different from this one or just be rid of the idea altogether.

So on an added note, the Screaming O's Ling-O vibrating tongue ring's packaging is recyclable, which is nice. The paperboard/cardboard back of its individual package, plus the plastic "nest" it sits in are both recyclable. The toy itself, however, is not. Sigh....I hate when products aren't recyclable, but that's one little con in many others.

So it's ribbed and nubbed, latex free, non porous (nice, so you can use basicallly any lube (flavoured if you wish for oral)), phthalates free, and hypo-allergenic! Great pros!

It also includes the batteries, is ergonomically shaped for the female form, is contoured, is powerful for such a small toy, and has an easy to use power switch that makes it so the toy will sit evenly on the tongue as best as it can.

TPR silicone is a great product material, and I'm really impressed at Screaming O for making this toy in TPR silicone.

Plus, this is easy to hide and discreet, because it's very small.