The Opus E combines e-stim and male masturbation with soft interior that transmits electrical currents from the base of the penis to the tip. A Masturbator with adapter cable to connect it to the E-stim devices TENSION LOVER or CLUSTER BUSTER. Also suitable for the wireless receiver SULTRY SUB. Can also be used without electrical stimulation. Anatomically neutral opening.IMPORTANT NOTE! Mystim Tension Lover Digital Nerv Stimulator or Mystim Cluster Buster Starter Kit is required for this item.