USB 3D Stereo Audio Adapter USB 2.0 Virtual External Mic Speaker 3D 5.1 Channel Audio PC Sound Card Adapter External USB 3D Stereo Audio Adapter USB 2.0 Virtual External Mic Speaker 3D 5.1 Channel Audio PC Sound Card Adapter Plug & Play No Drivers Needed 2.0 USB bus-powered mode, no external power required. Plug in the adapter, configure the sound settings on your computer and enjoy. Digital class-B power amplifier inside. Supports 3D post tonal sound and virtual 5.1 sound track. Compact design, Plug & Play, no installation required! No driver required, just plug and play. The Problem You May Have : 1. After plug in, no response: Whether there is red light show ? if there is ,please ensure the USB has been installed successfully as show the above picture , if there is no such page show, it means the usb audio device installed fails, please try another computer. If there is no light show, please change another USB connector to have a look. 2. When connected, the sound from the headphones is normal, but the microphone sound is very small: This is caused by the volume of micro in your computer, please set the micro volume maximum. Package Include : 1 x USB Audio Sound Card Adapter. Notes : 1.Plug and play, when the product is connected to the computer's USB port, there will be a red indicator light. If the light is not on, you must want to change another USB port. 2. When this product is connected to the computer, wait for 5-10 seconds, the computer will jump out USB installation, the following screen will appear at w7 system. Only in this way, it represents the successfully installed, you can use.