This product can convert digital audio signals (optical, coaxial, HDMI ARC interface) into analog audio signals (R/L, 3.5mm interface), and also supports optical fiber to coaxial and coaxial to optical signals, and almost no Signal loss, while using external power supply to ensure the stability of transmission. Let you easily experience the fun . Wire requirements:Square port optical fiber audio cable, coaxial audio cable, double lotus audio cable, 3.5mm audio cable, HDMI high-definition cable