1、Professional: This digital to analog audio converter is specially designed for home or professional audio switching, with stable connection performance. 2、Input And Output: Convert bluetooth, coaxial, for Toslink, USB, MIC audio signals to analog L/R audio, connect to external devices, such as amplifiers, through standard RCA type jacks. 3、Compatible: Bluetooth audio adapter supports 3.5mm/0.1in headphone jack output, which can be connected to headsets, PCs, etc, with good compatibility. 4、High Fidelity: Audio converter built in high fidelity amplifier chip, headset and RCA output port can easily receive 16‑300Ω high fidelity headphones. 5、Multi Functional: DAC converter supports power off, volume adjustment, multiple functions, easier to adapt to different sources and different environments.