Electrodes with biodegradable hydrogel and latex free. Compatible with most TENS, EMS equipment. With a compatible and universal 3.5mm snap type connector. They do not damage the skin or cause allergic reactions. Made with a low resistance carbon layer and carbon wires. Produced according to strict ISO quality standards with CE certification and FDA approved. Made in Belgium. DJO is a brand that offers surgeons and patients a complete range of primary and revision implants for hip, knee, shoulder and elbow joint reconstructive surgeries, as well as the tools and digital health technology needed in today's changing healthcare environment.