ElectronicsThis electronic part is a SMD (surface mount device) Crystal Resonator, model CJ03-120001220A20, manufactured by Changjiang Electronics. It is a high-precision, low-noise quartz crystal resonator with a HC-49SMD package, and is compliant with the EU's Restriction of Hazardous Substances (RoHS) directive. It is designed for use in switching power supply, smart meter, LC/TPI, ETC, communication equipment, cameras, MCU, server/PC, GPS navigation, toys, and other consumer electronics.