This flexible, versatile toy adds exciting electro stimulation to thrilling urethral insertion. The adjustable and removable balls at the top delivery the current inside as well as out. Just loop the noose style rubber loop around the head of your cock and tighten to fit you. Adjust the balls for precise stimulation, then plug the leads of your favorite power box into the ends and feel an extreme jolt of pleasure Works with most Zeus power boxes, sold separately. Measurements: Adjusts up to 3 inches in diameter, urethral pin measures 1.35 inches insertable length and 0.16 inches in diameter. Material: Silicone, metal, ABS. Color: Black. Note: Works with most Zeus power boxes, sold separately