The Opus E-Masturbator by Mystim has a donut-shaped opening and has a stimulating ribbed structure on the inside. Remove the sleeve from its casing. Electrodes can be attached to the sides for electro-stimulation. This is done by connecting the two push-button adapters on your powerbox to the Opus E-Masturbator. You will sense small electric impulses on both sides of the sleeve when using the powerbox. Use the masturbator in combination with water-based lubricant and optionally with some conducting lubricant such as The Godfather. The E-Masturbator can be cleaned with toy cleaner and lukewarm water after use.   Warning   Do not use in case of heart complaints/pacemaker or with cardiac arrhythmias Do not place on eyelids Do not place on damaged skin  Avoid abrupt changes in shock in/adjustment  Keep out of reach of children Do not turn on the control unit until you have attached the accessories to the body, not before.