The product is a set of three SC/UPC 15dB singlemode fiber optic fixed attenuators, featuring a male-female connector configuration. These attenuators are designed with a blue color and are specifically labeled as "SM" for single mode operation. The SC connectors ensure reliable and secure connections for networking cables and adapters, making them essential components for computer and networking systems. Ideal for professionals in the field of computer cables and connectors, these attenuators provide precise attenuation of optical signals for a variety of applications.