The surface of the baffle is plated with an anti-rust conductive coating and designed with EMI shielding features to help reduce electromagnetic interference. The coaxial RCA interface has been tested for over 10,000 plug-in cycles and 24-hour salt spray resistance. The internal plastic core is made of lead-free, environmentally friendly, high-temperature resistant material to ensure stable signal transmission and durability. Features a high-quality optical fiber head and a standardized chip reference circuit to support complete optical fiber signal output. The circuit board is 1.5mm thick and includes a grounded shielding layer on the back to help prevent deformation and electromagnetic interference. Notice: 1. This daughter card is compatible with most computer motherboards but not all. Before purchasing, please verify that your motherboard has a 2-pin or 3-pin header labeled SPDIF-OUT, SPDIF-O, HDMI_SPDIF, JSP1, etc. (some motherboards may have a 5-pin connector). If your motherboard does not have an SPDIF header, this daughter card will not work. Additionally, some lower-quality motherboards may have SPDIF pins without signal output, which are also incompatible. 2. Ensure proper connection before use; incorrect wiring may damage the daughter card or motherboard. Material: Plastic Color: Black Package Contents: 1 x Daughter Card 1 x Dupont Wire Set Note: Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.