Rock-hard, ultra-sensitive nipples and enhanced arousal are just a touch away. With the push of a button, Swell adheres perfectly to the skin with a strong automatic suction seal for hands-free enjoyment. Just place the transparent cups over each nipple, power on, and watch them grow. Powerful multi-function vibrations with separate controls for each cup increase the intensity even further, while straightforward controls make Swell perfect for both solo and partner play.