Desktop computers can only listen to music. If you want to make a video call, it can only be used on a laptop, but the microphone connector must be a three-stage connector to work properly. Headphone and speaker connector : 3.5mm internal thread. Microphone connector : 3.5mm female connector. Pair with USB hub or USB expansion cable for flexible installation. No driver is required, no external power supply is required, and USB is fully powered, plug and play, replacing the traditional sound card. Compatible : Digital devices with USB ports. Supported operating systems : Compatible with Windows, compatible with Windows 98/2000/Me/XP, OS Mac 8.6 or above. It fully supports WAV/MP3/WMA/MPEG1 VCD/MEG2 SVCD,/AVI/DVD Audio/DVD AC3/DVD DTS/DiVX files. The package is equipped with 4pcs external 5.1 USB stereo sound cards(2 black & 2 blue), with a 3.5 mm headset and microphone. The sound card supports 3D sound. Virtual 5.1 sound effect. It does not need the existing sound card and works independently.