The CS16M025000RDCAD1 with HC-49S-SMD-2P Crystals ROHS is a rectangular crystal module manufactured by Tai-Shing Electronics Company, Ltd. (TKD). It is an electronic component specifically designed as a resonator for microwave oscillators and other frequency control and timing applications in automotive, medical, industrial, and consumer electronics. The crystal comes with an HC-49S-SMD-2P package size and is constructed with crystals in an enclosure with two leads on each side, which serves as the electrode for electrical connection. The component is made to be RoHS compliant, meaning that it is free of hazardous substances such as lead, mercury, and cadmium.