Rechargeable dual ring with flickering teaser and sensual ridges. 10 turbo charged speeds of rumbling vibration. Body-safe Silicone and waterproof submersible - IPX7. USB rechargeable - magnetic charging cord included. State-of-the-art memory chip resumes on last speed used. Security travel lock feature - hold for 3 seconds to turn on or off. Complete charge in 1.25 hours. Runs for 35 minutes on high speed and 45 minutes on low speed. 4 in x 2 in/10.25 cm x 5 cm (enhancer). 1.5 in/3.75 cm (diameter – shaft ring) 1.75 in/4.5 cm (diameter – scrotum ring)