Power Clit Phospho Fluorescent, glow-in-the-dark erection ring with vibration. It maintains the erection, significantly extending the duration of intercourse. The built-in vibrator stimulates the clitoris and vaginal entrance, giving your partner a lot of pleasure. The product is made of medical silicone. Material: silicone Vibration modes: 1 Length: 6.5 Outer diameter: 4.5 cm Size: universal Power supply: 2 LR41 batteries (included).