This device can distribute one optical fiber digital audio signal to two signals, which connects to two sets of power amplifier system. Built-in Bluetooth transmitter function, which can help users with easily connecting high-quality digital audio signals to Bluetooth-compatible receiving devices, likes Bluetooth-compatible headphones and Bluetooth-Compatible speakers. It supports digital audio to analog audio conversion signal, Bluetooth-compatible automatic search and connection receiver, and has a built-in high-performance DAC chip, supporting 192K/24bit sampling rate.