[USB DAC Audio Converter] Transfers the computer's audio signal through the USB port, converts audio to optical, coaxial, 3.5mm, or 6.3mm headphone jack. Can also be used as an external sound card. (Note: 5.1 channel is incompatible; please set the audio output to PCM or LPCM) [16-300 Ohm Hi-Fi Headphone Amplifier] Supports most headphones with impedance from 16 to 300 ohms, signal-to-noise ratio greater than 100dB, THD+N = 0.0003%, effectively filters noise for high-quality audio performance. [USB Input Volume Control for Headphone Sound] Features USB inputs with a volume control knob to adjust headphone volume directly. [Good Compatibility] Compatible with Windows and Mac systems. For optimal playback on Windows. Also compatible with PS4, PS3, Xbox 360, and Xbox One S, allowing connection of headphones via USB DAC for gaming. [Plug and Play] No driver required. Simple plug-and-play setup for instant audio playback. Compliant with all mainstream operating systems. No external power supply needed, providing an easy way to upgrade your PC into a high-fidelity music source. Color: Black Material: Plastic Size: 106 x 66 x 25.5 mm Package Contents: 1 x Audio converter (silk screen may vary slightly due to manufacturing) 1 x 3.5mm adapter 1 x USB cable 1 x English instruction manual Note: The package includes only the items listed above. Other accessories are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: ±1–3 cm.