The ETG collectively designs, manufactures and sells various types of electronic, data and microwave, and electro-optical products, including infrared simulation and test equipment, laser rangefinder receivers, electrical power supplies, back-up power supplies, power conversion products, underwater locator beacons, emergency locator transmission beacons, flight deck annunciators, panels, and indicators, electromagnetic and radio frequency interference shielding and filters, high power capacitor charging power supplies, amplifiers, traveling wave tube amplifiers,