This black cock ring is made for men who want to enjoy sex even more and want to last longer in bed. The ring is provided with a mini vibrator that makes sure you and your partner experience a great stimulation. The Stayer cock ring is made of soft and elastic material for a perfect fit. The vibrating ring is napped for added stimulation. The set includes 2 sets of batteries. 1 set lasts approx. 45 minutes.