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

BK Technologies

Market Cap: US$296.9m

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

Acorn Energy

Market Cap: US$50.7m

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

Westell Technologies

Market Cap: US$50.1m

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

Neonode

Market Cap: US$27.4m

Develops optical sensing solutions for contactless touch, touch, and gesture sensing in the United States, Japan, South Korea, Germany, Sweden, China, and internationally.