U.S. Tech High Return On Equity, Low Debt

BK Technologies

Market Cap: US$317.3m

Through its subsidiary, BK Technologies, Inc., engages in the design, manufacture, and marketing of wireless communications products in the United States and internationally.

Westell Technologies

Market Cap: US$63.1m

Through its subsidiary, designs, manufactures, and distributes telecommunications solutions to telephone companies in the United States.

Acorn Energy

Market Cap: US$43.1m

Through its subsidiary, develops and markets wireless remote monitoring and control systems in the United States and internationally.

Neonode

Market Cap: US$23.5m

Provides software solutions for machine perception to detect and track persons and objects in video streams from cameras and other types of imagers in the United States, Japan, South Korea, Germany, Sweden, China, and internationally.