Earmark, LLC, located in Hamden, Connecticut is a 28-year old company that 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. Earmark owns several patents and trademarks on its technology and products.

Earmark's main products and systems consist of radio headsets, belt worn radios, repeating base station radios, belt-worn voice amplifiers, and microphones. Earmark systems can be tailored to meet the working environment and application needs of the customer. Hands-free operation and private network communications are delivered by Earmark systems.

Earmark enjoys an excellent industry reputation due to its technological superiority coupled with a corporate mentality of continually striving to comprehend its customer industries and needs. Underwriter's Laboratories list all of Earmark's full-featured portable radios as "Intrinsically Safe".

Founded in 1973, the company was formed to commercialize the concept of AM Loop Technology as applied to Language Laboratories and Simultaneous Translation Systems. The company's technology in this area provided the springboard for the development of Auditory Training systems for the hearing impaired (1976) and finally into specialized areas of headset radios (1980), duplex wireless intercommunication systems (1983) and communications equipment for people wearing respiratory protection apparatus (1984).