USB Rechargeable, Long Time Use - Low power? Never worry about that! We use rechargeable battery makes it power up all the way! After using it you can put an USB cable to charge this penis ring, and enjoy it next time! 9-Speed Vibration Modes - New style of vibration penis ring, provide 9 vibration modes, different speed and strength of vibration for different kind of people. Find the most suitable one for you. Waterproof & Safe Material - Main body is made of soft medical silicone, safe and skin friendly. The item is full waterproof, you can even use it when bathing or in the swimming pool, more fun for the shower time! Multifunctional Sex Toy - Lock it on and it is a penis ring, to make you stronger and more lasting. Take it off and use the vibration function on your wife, it is a g-spot massager, satisfied both of you in couple life.