The IS Smart Muff combines Sensear’s one-of-a-kind SENS™ (speech enhancement, noise suppression) technology to enable clear and safe communication in high noise environments where hazardous and potentially combustible materials are present. The IS Smart Muff enables users to communicate via face-to-face, two-way radio (with a compatible IS model), or Bluetooth through a cell phone without ever having to remove the hearing protection. Additionally, the IS Smart Muff enables muff-to-muff communication in short range distances (up to 50 meters). Sensear,, (888) 9SENSEAR.Sensear