1. EASY TO USE: The DAC module can be installed in an amplifier to expand the amplifier's input; it can be connected to the digital output of a PC, TV box, etc., via optical fiber or coaxial. 2. STABLE TRANSMISSION: The fiber coaxial decoder board uses digital signal transmission, effectively reducing interference noise between machines and equipment, and improving sound quality. 3. INPUT AND OUTPUT: Fiber and coaxial digital signal input (fiber optic priority). Without fiber inserted, the input defaults to coaxial. Output is a stereo audio signal 0.7VA (with mute function). 4. SUPERIOR PERFORMANCE: The decoder board uses the 8416+4344 scheme. Optical coaxial connection offers better audio quality than standard audio decoding. 5. SIMPLE TO INSTALL: The fiber coaxial decoder board features an LED angle parallel design with a 6mm/0.24in LED bracket. The LED center point to PCB is approximately 65mm/2.56in, making it easy to install. Supports 32K-192K and includes reverse connection power supply protection.