The ESB6.00000F20D25F with SMD Crystal Resonators 6MHz ±20ppm 49SMD RoHS is a 49-SMD, RoHS compliant crystal resonator manufactured by MONEC. It has a frequency of 6MHz and a tolerance of ±20ppm. It is primarily designed to be used in high-frequency digital circuits, such as clock oscillators, signal generators, and timing circuits. It also works well in oscillators, RF and microwave circuits, and other applications that require precise frequencies and timing. It has a wide operating temperature range and is capable of operating at frequencies up to 6MHz.