The E5SB8.00000F10E11 is an SMD (Surface Mount Device) crystal manufactured by Hosonic. It is a 4-pin SMD-5032 crystal that meets RoHS (Restriction of Hazardous Substances) requirements. The crystal has a frequency of 10.00MHz, which is the frequency of electronic oscillations that it produces. It is used in many electronic circuits, such as for timing, frequency control, and sometimes in wireless communications.