Tel-Instrument Electronics Corp. is a designer and manufacturer of avionics test and measurement solutions for the global commercial air transport, general aviation, and government/military aerospace and defense markets. The Company provides instruments to test, measure, calibrate, and repair a range of airborne navigation and communication equipment. Its segments include avionics government and avionics commercial. Avionics government segment consists primarily of the design, manufacture, and sale of test equipment to the United States and foreign governments and militaries, either directly or through distributors. Avionics commercial segment consists of the design, manufacture, and sale of test equipment to domestic and foreign airlines, directly or through commercial distributors, and to general aviation repair and maintenance shops. It sells its equipment in both domestic and international markets. Its products include T-47/M5 Dual Crypto Test Set, T-4530i IFF Test Set and others.