Sunny Electronics Corp., together with its subsidiaries, manufactures and sells frequency control products. The company offers crystal units, filters, crystal oscillator, VCXO oscillators, and TCXO and VCTCXO oscillators, as well as jewel screws. It also provides wired/wireless communications devices, as well as engages in information communications business. The company was formerly known as Sunny Electric Engineering Co., Ltd. and changed its name to Sunny Electronics Corp. in March 1999. Sunny Electronics Corp. was founded in 1966 and is headquartered in Chungju, South Korea.