The Mystim Sultry Subs Black are versatile and obedient team players that can deliver electrical pulses to multiple Mystim toys, providing a customizable and cable-free experience. With features like self-adhesive electrodes, remote control, and a rechargeable battery, these CE-certified subs are perfect for indulging in personalized pleasure or pain, but remember they require a Mystim Cluster Buster Device for operation.