Use Blush Novelties' Stay Hard Reusable Cockring to make your cock longer, thicker, and stronger. Your cock and/or balls are hugged by a stretchy band TPE cockring to maintain a firm erection. To make things easier for you, demo batteries are installed. Turn on the powerful vibrations during sex to simultaneously stimulate and satisfy your lover and yourself! Extra batteries are included for longer sessions, and the battery life is around 30 minutes. Free of latex and phthalates. 2 L736 batteries are required. Includes batteries.