The Rio is an anal vibe from VeDO that will definitely ignite and arouse your deepest anal desires. The Midnight Madness version can be simply described as a blue anal stuffer but with its tip gently rounded for ease of penetration and the tapered body that goes to a max diameter of 3 centimeters, it understates the simple but exquisite beauty of this blue butt plug. It also packs the power in its quiet motor and it also has 10 vibration modes that you will enjoy. Getting it wet and underwater is also cool because it is waterproof and submersible. Power comes from a single AAA battery. It is 5.31 inches long.