TOYBOX Sonic Blue a silicone one size stretchable USB rechargeable vibrating ring. Ergonomically designed intended to pleasure at the same time both partners during sex. The vibration ring actually has 2 uses - One - when the ring sits at the base of the penis it intensifies the pleasure strengthens the erection and delays the man's ejaculation. - The second - the upper part has a powerful vibration motor plus a small silicone brush texture which during penetration touches the woman's clitoris and gives additional stimulation and pleasure.