The CJ16-240001210A20 with SMD2016-4P Crystals ROHS is an electronic component manufactured by Changjing Electronics Technology. It is a crystal oscillator, which is used to create a certain frequency of oscillations that are perfect for controlling the frequency timing and generation of digital signals. This component has a small footprint and is made in a surface mount package. It is also compliant with the Restriction of Hazardous Substances Directive (RoHS), meaning that no hazardous materials are used in its production. This component is suitable for use in high-frequency circuits, making it an ideal choice for use in portable communication equipment, computers and other digital products.