便携式 Semi-7.1 USB 声卡可以直接通过 USB 接口外接在桌面电脑、便携电脑上面，根据产品介绍可以提供相当音质的 7.1 声道的效果，售价仅为 40 美元。

主要特点：

- Instant sound USB card
- Plug and play technology - no drivers
- Emits high-quality 3D sound
- Sound simulation software included
- Supports microphone 'In' function
- Includes Speaker out function
- Audio playback
- Compliant with Windows 98 and Mac OS 9.0 or above
- Small and light for easy transportation