The AI-1’s single input is a NeutrikTM Combo Jack, which takes both a 3-pole XLR (common to most microphones) and a quarter-inch jack common to most electric instruments like guitar, bass et al. Layering tracks is as easy as plug in, set level and go. Not only does the AI-1 deliver crystal clear audio to your computer software, but headphones have never sounded sweeter thanks to the discrete studio-quality headphone output and level control. Specifications Computer Connectivity: USB Form Factor: Desktop Simultaneous I/O: 1 x 2 Number of Preamps: 1 Phantom Power: Yes Bit Depth: 24-bit Sample Rates: 44.1 kHz; 48 kHz; 88.2 kHz; 96 kHz Analog Inputs: 1 x Neutrik XLR-1/4” combo Analog Outputs: 2 x 1/4” (impedance balanced); 1 x 1/4” (headphones) Direct Monitor: Yes USB: 1 x USB Type C Bus Powered: Yes OS Requirements: Mac OS 10.10 or later; Windows 7 or later Power: USB bus-powered Depth: 100mm total (with knobs); chassis: 88mm Width: 124mm Height: 38mm Weight: 1lb 3.7oz; 560g WATCH: Features and Specifications of the RØDE AI-1 Audio Interface