This C10000J049 SMD Crystal Resonator 10MHz ±20ppm HC-49SMD RoHS manufactured by East Crystal is a Type "HC-49SMD" sub-miniature SMD crystal resonator, with a frequency of 10 MHz ±20ppm. It is a RoHS compliant device which is suitable for both consumer and commercial applications, and is made from quartz crystal which is traditionally used for electronic frequency control. Its small size and cost make it perfect for applications where a reliable frequency is required, such as in cellular and portable applications. This resonator is also of very high quality and considerable stability, making it a great choice for use in precision timing applications.