Aehr Test Systems designs and sells test and burn-in equipment for semiconductor devices at wafer, die, and package levels. The company's modular product line includes the FOX family of wafer-level systems (FOX-XP, FOX-NP, FOX-CP) with complementary contactors and carriers, and package-level systems (Sonoma, Tahoe, Echo series) acquired through Incal Technology, serving customers who need to verify reliability in artificial intelligence processors, power semiconductors, silicon photonics, memory, sensors, and automotive applications. The company generates revenue through sales of production and engineering systems, consumable components such as contactors and carriers with typical multi-year replacement cycles, and service contracts, distributing its offerings globally to semiconductor manufacturers, contract assemblers, and test service providers.