NUX Optima Air is a dual-switch acoustic guitar simulator effect. It features a preamp, dual-switch and knobs for control of functions Reverb, Gain, IR Level or 3-band EQ. Optima Air has a unique profile capture function, you can create your own acoustic guitar profile by capturing your favorite acoustic guitar's sound. There is an XLR DI output, headphones output for silent play and auxiliary input to connect a music player. It also supports USB audio stream, which means you could use Optima Air as recording interface.