The Metric Halo Mobile I/O ULN-2 2d Expanded Audio Interface is a high-quality audio interface designed for home recording. It features 2 microphone inputs, 8 channels, and a compact rack-mountable form factor. With a height of 2 inches and a width of 8 inches, this interface is lightweight at 5 lbs, making it easy to transport and set up for recording sessions. The Metric Halo brand is known for producing professional audio equipment, and this model is no exception, offering expanded capabilities for musicians and producers looking to enhance their recording experience.