Soft silicone cock rings with cable. These rings are round and bipolar. They can be used separately or together. The black parts are conductive. The power wire has a 2.5 mm jack plug that fits into our 3 different power box units ref # 7850, # 7880 and # 7890
Make sure you use enough contact gel to make a good contact with the skin.
Diameter rings: Ø 40 mm and Ø 50 mm