Maximus Enhancement System Crystal Rider 3 ways to please. Adds girth and support with instant activation. Soft and stretchy enhancing system vibrates on contact, or works continuously with the flip of a switch. Removable, wireless micro-stimulator. Safe and pure for body and pleasure. Made using phthalate free, non-toxic materials Thermoplastic Resin TPR enhancer, ABS plastic stimulator. Batteries required to power up 2 watch size, 4 included. Enhancer measures 4 inches long by 1.75 inches wide. Stimulator measures 1.25 inches long by 1.25 inches wide. Maximus Enhancement System Rider is a registered trademark for California Exotic Novelties.