The DoubleO 8 vibrating erection ring features two specially positioned rings and a vertical vibrator angled for maximum stimulation where traditional vibrating rings cant reach! Simply stretch one ring around the shaft and the other around the testicles for an extra-secure fit and super-powered pleasure where it counts! - Available in three fun colors: blue. purple and clear- Reusable- Replaceable AG13 batteries last 80 minutes- SEBS silicone- Latex- and phthalate-free- Wireless- Waterproof