This is an SMD Crystal Resonator manufactured by JGHC, RoHS certified, in a S32120000810A5D1JB package with 4 pins. It is an oscillator used to generate a steady and precise frequency when connected to a voltage source. It can operate at frequencies between 3.2 MHz and 32.0 MHz, and is typically used in communication applications, watches and clocks, automotive systems, and more.