The perfect addition to the HYDROMAX series! Rechargeable vibro-ring for the HYDROMAX penis pumps 5, 7 and 9. This special accessory is positioned on the cylinder above the flexible sleeve. It combines the water-based pump training with a vibration therapy that increases the blood flow: it enhances the blood circulation in the penis and provides faster, stronger erections. The HydroVibe ring is made out of flexible silicone. It comes with 2 waterproof vibro-bullets, each with 10 vibration modes. They can be controlled separately. Includes a USB cable. Complete length 11 cm, Ø 6 cm (flexible). Silicone, ABS.