1. wave wheel tuning knob, built-in DSP audio amplifier module, which can increase the volume by 15% 2. It is suitable for most earphones, compatible with mainstream equipment, and compatible with most earphones. It can convert the output analog signal of the , notebook, desktop, audio and other interfaces into digital signal output. 3. One-key operation, convenient and fast, quickly change the mode 4. Compatible with two headphone jacks, compatible with single/dual plug headset jacks 5. Driver-free installation, plug and play, compatible with windows7/8/9/10/XP /ista/ OX x 10.4-10.8/Linux Product name: USB sound card Number of interfaces: USB x 1, headphone port x 1, headset port x 1, microphone port x 1 Applicable slot: USB interface Input and output interface: linear output (front), linear input Support channel: 7.1 channel Installation : external color:black Material: plastic Size:18 x 3.5cm Package Contents: 1 x USB Sound card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. 1. Large wave wheel tuning knob, built-in audio amplifier module, which can increase the volume by 15% 3. One-key operation, convenient and fast, quickly change the mode 4. Compatible with two headphone jacks, compatible with single/dual plug headset jacks 5. Driver-free installation, plug and play, compatible with windows7/8/9/10/XP /ista/ OX x 10.4-10.8/Linux 2. It is suitable for most earphones, compatible with mainstream equipment, and compatible with most earphones. It can convert the output analog signal of the tablet, notebook, desktop, audio and other interfaces into digital signal output.