Q16000c056 with SMD Crystal Resonators 16MHz ±10ppm SMD-2520_4P RoHS is a small-size, surface-mountable quartz crystal resonator that operates at 16MHz. It is designed for use in applications such as oscillators, clock generation, and timing applications. It has a frequency tolerance of ±10ppm, and comes with SMD-2520_4P (4-Pole) leads that allow it to be easily soldered onto a PCB board. It has been manufactured according to the RoHS (Restriction of Hazardous Substances) standards, which means that it does not contain any hazardous substances of the EU's list of banned substances.