These Electro Penis Rings are a unique accessory for electrosex play and are based on electronic nerve stimulator technology. When used with a control unit you generate safe electrical pulses, which are transmitted along a cable to the Electro Rings. Two rings are used, one at the base of your cock and one further up. When the control unit is switched on, the pulses will be felt as tingling or pulsing sensations as the underlying nerve fibers are stimulated and excited. The type of stimulation and the intensity level is determined by adjusting the controls on the control unit. The penis rings and designed to be used over the shaft of the penis. Made of polished steel. Kits contains 5 Rings. Size 36,38,40,42,44 MM. Smooth edges for a comfortable fit Mono-polar design. Compatible with all tens units, our E-Stim kit and Rimba kit. Works with Erostek and Folsom units with our Banana to Pins adapters.