The Q24FA20H00729 with SMD-2520_4P RoHS is an electronic device manufactured by Epson featuring a crystal resonator. This component is a surface-mounted device with four pins. The crystal resonator creates a signal with a precise frequency, which is then used to synchronize the internal circuitry of a device. This component is RoHS compliant, meaning its manufacturing process and components used are non-toxic and environmentally friendly.