Rimba Elektro Play Aluminium Penis Ring Set with 3 different rings and a power wire with banana plug. Each ring is unipolar and has a socket for connecting a banana plug. Since a single ring is unipolar, you need to use 2 pieces simultaneously or use another unipolar electrode with a banana plug. When two unipolar electrodes touch the human body at the same time, an electric shock can be triggered. Always be cautious, do not use the product if the skin is broken or irritated, if you have heart problems, or if you are pregnant. Tip: Use Rimba contact gel for the best results. This Rimba Electro Sex Ring cable has a 2.5 mm jack that can be directly connected to all Rimba Power Box devices.