Focusrite RFO SCARLETT4-18I1618i16 is the complete portable studio hub producers. Whether you're on the go, hopping from sessions, or recording at home, you'll always have access to two of our finest preamps, plus instrument, line, and MIDI connections for whatever the project throws your way: guitars, keys, synths, grooveboxes, and controllers. And if you're looking to expand your channel count, it's easily done with S PDIF and ADAT.