Keystone Jack for fiber optic cables with SC type connectors.For use with fiber optic networks.* This product can not be used to connect TOSLINK optical audio cables like those used for home theater equipment. It is ONLY for computer network equipment which uses fiber optic connectors.** Monoprice continually strives to improve its product line to bring our customers the best products available. Therefore, changes may be made to listed specifications without prior notice. Item received may not match photo or specs shown.  *The color indicated can vary in tone and/or hue between production runs and manufacturing facilities.  The color of this item may not be an exact match to any other product, even if they are indicated as being the same color, whether sold by Monoprice or any other vendor.  Individual pieces may also vary very slightly in color from each other.Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov