Key Features: 7 vibration settings; 1 diameter; Waterproof. Requires 3 x LR44 batteries included. Includes a removable bullet. For double the pleasure together, add our Stealth Cock Ring to your sessions. Shaped with a nodule texture for added sensation, this super stretchy couples' ring helps keep him harder for longer, while the removable bullet sends vibrations to where you want them the most. Simply slip it on, come together and enjoy in the mutual satisfaction. For optimum performance we would recommend new batteries when using your toy for the first time. Do not mix different types of battery brands or mix new and used batteries as this may effect the performance of your product. When using rechargeable batteries make sure they are fully charged before use. Rechargeable batteries may limit the power output of the product and may compromise the overall performance.