The Scarlett 2i2 is a USB audio interface that allows you to record and play back digital audio. You can record audio in several formats, including WAV and AIFF, when connected to your computer, using the Line or Hi-Z (Analog) input options. You can also record audio to one of two external audio drives. Once you are done recording, you can listen to your audio with headphones or earphones while monitoring playback with the built-in speaker.