Feature 1 .Ultra-compact design, supporting Bluetooth, coaxial, optical,HDMI audio, and USB inputs.2. Supports HDMI (ARC) audio return channel function for connecting to the HDMI interface of a TV, enabling audio output from the TV.3. The USB interface can be connected to a computer or smartphone, enhancing audio quality.4. Optical and coaxial inputs support signals up to 24-bit/192kHz.5. Built-in independent audio DAC chip ES9023, effortlessly providing excellent audio performance.6. Integrated high-performance power system allows for excellent performance with USB power alone. Specifications Input:BT / Optical / Coaxial / HDMI / USBOutput level:1.9VrmsTHD+N:0.005%(-117dB)Dynamic Range:96dBSNR:98dBUSB Compatibility:Windows 7 / 8 / 8.1 / 10 / 11 Mac OS X10.6 or Later / LinuxSampling Rate:USB :PCM 44.1 ~ 48kHzOptical/ Coaxial:44.1kHz ~ 192kHzPower Consumption:2WStandby Power:0.1WSize:105x22x80mm (WxHxD)Weight:90g/0.20lbs