USB Stereo Audio Adapter External Sound Card with SPDIF Digital Audio Out and Built-in Microphone - USB Sound Card Adapter Add a 3.5mm audio connection with SPDIF digital output and an external microphone to your system through USB USB Stereo Audio Adapter w/ Built-in Microphone USB Save time and hassle by adding audio capability without having to open your computer case Built-in microphone Offers more flexible microphone placement options than an on-board audio adapter, helping to eliminate audio feedback Save time and hassle by adding audio capability without having to open your computer case Enclosure Type: External