This ring for the testicles includes the cable with banana connectors. It consists of two half rings (+ and -) rubber, forming a complete ring of 3.4 cm in diameter (inside). Only when the two rings are joined and touch the skin will the electro shock be connected. Thanks to its 2.5 mm connector you can connect it to the Rimba Power Box. Remember that if you have sensitive or irritated skin, if you are pregnant or have heart problems you should not use this ring. Use a conductive gel to experience the best results. Features: Inside diameter: 3,4 cm Aluminium