Cock ring by Lover's Choice Inc.
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The vibrations are impressive for such a small vibe, but the limited battery life and non-replaceable batteries could put a damper on your fun if you don't have something to replace the vibrator with. The silicone makes it a very safe choice, and its size should fit most people. Overall, this is a great vibrating cock-ring - especially for the price.
Made from silicone, the ring can be worn either around the shaft or shaft and testicles for extra stimulation. It comes with a bullet vibrator which provides weak vibrations for about an hour of use. The V-Ring can provide pleasant stimulation for both partners--but if you need stronger vibrations this probably isn't the toy for you. After the bullet dies, you can continue to use it as a simple cock ring, or purchase a replacement bullet to keep the good vibes coming!
This is a great toy and does what you want. This is a great toy over all, just can't change the batteries out is the only problem.
The Ophoria V-Ring No 5 is a generously sized, silicone cock ring. The included micro bullet lasts 40 minutes. After is dies, it can be removed so the cock ring may be reused. As it is silicone, it can be sanitized between partners. The clitoral stimulator is small and may not reach all women though.