Finally, a high quality dual-motor cock ring. The Duet is made of soft and very stretchy clear elastomer. The larger vibrator has an on/off switch while the smaller vibrator has a switch to turn it from steady on to vibrating only when pressed - allowing for more versatililty and play with the vibrations. Motors on both side of the ring allow both partners to feel more vibration. Vibrators are easily removed for cleaning and changing batteries. Each vibrator takes two LR1130 watch batteries. Two full sets are included.