The Mystim Sultry Subs Black are versatile and obedient team players that can be wirelessly controlled by the Mystim Cluster Buster to deliver customized electrical pulses to multiple Mystim toys. With features like self-adhesive electrodes and a rechargeable Li-Ion battery, these remote-controlled electrical sex toys offer a unique and customizable experience, but require a Mystim Cluster Buster Device for operation.