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Ins and Outs • Single rack unit form factor with two mic/instrument inputs on the front panel
• Analog, ADAT and S/PDIF input/output options
• Eight analog inputs with combi jacks accepting both XLR and ¼-inch connectors
• Ten configurable ¼-inch line output channels
• Eight ADAT optical digital input and output channels
• Two S/PDIF coaxial digital input and output channels
• Two banks of switchable phantom power for use with condenser mics
• Front panel Monitor level, as well as two individually configurable headphone outputs
• Monitor Dim and Mute buttons on the front panel
• MIDI in and out routing
https://us.focusrite.com/en/usb-audio-interface/scarlett/scarlett-18i20
Scarlett 2nd Gen Getting Started Guides
Scarlett 18i20 2nd Gen User Guide
Focusrite Control User Guide