Shenzhen Crystal Technology Industrial Co., Ltd. was founded in 1989 and is a professional manufacturer of frequency control components. Its component families are Quartz Crystals, 32.768kHz Crystals, Filters, Oscillators, MEMS, VCXO, TCXO, OCXO, Ceramic and SAW Resonators/filters. It manufactures under its brand name SJK, which stands for Satisfaction Quality, Just-in-time Service and Key-cost Offering. Its facilities have passed ISO-9001, ISO-14001, ISO/TS 16949, QC-080000 and other international certifications, and our components are RoHS and REACH compliant.