Black Lion Audio Revolution 2 x 2 USB 2 Channel Portable Recording Interface...

Sound Devices USBPre Gen 1 Black 2-Channel Portable USB-B Preamp Audio Interface

mini 2 Channel USB Audio Interface for Recording, Streaming and Podcasting, w...

Sound Devices USBPre Gen 1 Black 2-Channel Portable USB-B Preamp Audio Interface

M-Audio M-Track Plus 2-Channel Portable USB Audio & MIDI Interface

USBPre Portable 2-Channel USB Audio Interface