We are a professional manufacturer of crystal oscillator and RF/microwave filter in China. *Crystal Oscillator: Used both SC cut and At cut crystal resonator , we can provide customers with high stability, ultra low phase noise crystal oscillator. Available package sizes are from 2.5*3.2mm up to 50*50mm *OCXO (10~200MHz) *TCXO(1~200MHz) *VCXO(1~600MHz) *DTCXO(1~160MHz) *SPXO(0.032~680MHz) We also provide other frequency control devices such as: *Quartz crystal *Tuning Fork *Ceramic discriminator *Oscillator base We currently export to over 20 countries worldwide. Our total commitment to quality is underlined by our registration to ISO9000-2000.We also maintain greater control of each step of the manufacturing process required to produce reliable and repeatable products. At Chengcheng we listen, learn and share insights, not simply providing products but creating future focused solutions.Chengcheng strives to be extremely flexible and focused on service, responding quickly and professionally Helping customers Innovate , Improve and grow their business..