Earmark, located in Hamden, Conn., designs and manufactures durable wireless communication systems for use by teams operating in difficult and/or hazardous and high noise environments. Earmark is renowned for its extremely rugged and reliable, yet easy to use products. The range and flexibility of Earmark systems are unique. Furthermore, Earmark is well known for its commitment to understanding the working conditions of its customers, the industries that they work in and providing the best possible solutions on a case-by-case basis. In addition, Earmark owns several patents and trademarks on its technology and products. Its main products and systems consist of radio headsets, belt worn radios, repeating base station radios, belt-worn voice amplifiers and microphones.