Introduction: KDS is one of the world's leading crystal oscillator manufacturers, founded in 1959 and has a history of 51 years. ISO 9001, ISO 14001, ISO/16949 and other international system certifications are the guarantee of KDS's quality and reputation. KDS mainly produces temperature compensated crystal oscillators (TCXO), constant temperature crystal oscillators (OCXO), voltage controlled crystal oscillators (VCXO), clock crystal oscillators (SPXO), crystal resonators, crystal filters, and other products; Its products are widely used in mobile phones, walkie talkies, GPS/Beidou positioning devices, automotive electronic systems, reverse radar, small base stations LTE、RFID、 Fields such as laser rangefinders, laptops, tablets, digital cluster communication systems, and instrumentation.