Shenzhen Jingkexin Industrial Co., Ltd. was founded in 1989, is focused on research and development, production and sales in one of the crystal oscillator factory, the exclusive brand SJK, best-selling at home and abroad, is the crystal oscillator industry's leading brand, and its products are quartz crystal oscillator, quartz crystal oscillator, SMD crystal active crystal oscillator (differential output crystal oscillator, general crystal oscillator SPXO, voltage-controlled crystal oscillator VCXO, temperature-compensated crystal oscillator TCXO, OCX0, 32.768kHz crystal oscillator, etc.), MEMS oscillator, 32768kHz crystal oscillator, quartz crystal filter MCF, ceramic crystal oscillator, ceramic filter, surface acoustic wave resonance