Spectra 360 is the leading conductivity gel used by hospitals clinic. Spectra 360 gel is a salt-free, chloride-free electrically conductive gel, and is recommended for guaranteed conductivity for heart rate transmitters and ultrasounds. Spectra 360 is designed for all electro-medical procedures, except defibrillation. The salt-free characteristics make it particularly suitable for long-term applications. It works by wetting the skin, thereby reducing skin resistance.