Electronic Systems Technology Inc. was founded in 1982 and is based in Kennewick, Washington. Electronic Systems Technology Inc., doing business as ESTeem Wireless Modems, engages in the development, manufacture, and marketing of wireless modem products and accessories. It offers ESTeem wireless modem product lines, which provide wireless communication links between computers, peripherals, and instrumentation controls using radio frequency wave. The company also provides narrow band packet burst radio modems, frequency hopping and direct sequence spread spectrum transceivers, and Ethernet spread spectrum products for commercial, industrial, and public safety applications. In addition, it offers various accessories, such as antennas, power supplies, and cable assemblies to support the ESTeem products; services to customers, such as repair and upgrade of its products; and site survey testing, system start-up, and custom engineering services. The company serves the process automation markets in commercial, industrial, and government arenas in the United States and internationally, as well as domestic markets for public safety communications infrastructure. Its products are marketed through direct sales, sales representatives, and resellers.