The JGHC 9AC045001320A0C3 Crystals is a 4.5MHz, 49S, 13pF, 100O (±20ppm), -40?~+85?, HC-49S-2P type crystal manufactured in compliance with the ROHS standard (Restriction of Hazardous Substances). It has an operating frequency of 4.5MHz and a capacitance of 13pF. The impedance of the device is 100O with ±20ppm tolerance. The operating temperature range is -40? to +85? (-40°F to +185°F) with an optimal working temperature between 25? and 70? (77°F - 158°F). This crystal is RoHS compliant and is designed for general purposes, such as timing in radio receivers, transmitters, computers, modems, and instruments.