Designed for use with Advantage® 1000 respirators and the Millennium® Chemical-Biological mask, the ESP II communications system is a self-contained electronic speech projection device. The compact, battery-operated unit clearly amplifies and projects the wearer's voice, allowing ungarbled speech to be heard, even in areas with high ambient noise. It is especially useful in the chemical, wastewater treatment, and nuclear industries, for domestic preparedness applications and in other environments where full facepiece air-purifying respirators must be worn and where communication between workers is important. Easily installed in seconds, the ESP II system is designed to clip onto the respirator facepiece’s speaking diaphragm housing.