Rimba Electro Play bipolar penis strap made of genuine nappa leather This handmade penis strap is adjustable with a metal buckle, and has metal studs connected to the power wires on the inside. When this strap is worn tightly on the skin (of the penis or scrotum), a shock can be applied. Always be careful. Do not use if the skin is broken or irritated, if you have heart problems or are pregnant. Tip: Use Rimba contact gel for best results. This item has a 2.5mm jack plug that plugs directly into all Rimba Power Box devices.