Beijing YanDong MicroElectronic Co., Ltd. engages in the design, manufacture, and sale of discrete devices, analog integrated circuits, and integrated circuits and devices in China and internationally. The company offers discrete devices, including surge protector, ECM preamplifier, digital transistor, RF power devices; and analog integrated circuits, such as voltage regulation circuit and operational comparator. It also provides wafer manufacturing and package testing services. The company's products are used in consumer electronics, security equipment, automotive electronics, communications, earphone, microphone, smart access system, intelligent calling system, voice-controlled lights, home appliances, mobile communications, power supply, and industrial control applications. The company was founded in 1987 and is headquartered in Beijing, China. Beijing.