The Ui12 also features four XLR combo mic/line inputs, four XLR mic inputs, two channels of Hi- Z/instrument inputs, as well as a stereo RCA line input. A 2-channel USB media player is included, along with two balanced XLR Aux outputs, two quarter-inch headphone outputs with level control, plus balanced stereo XLR and quarter-inch main outputs. Two-channel USB audio playback is compatible with MP3, WAV and AIFF formats. Features Tablet/PC/Smartphone Controlled Digital Mixer Integrated Wi-Fi Cross-platform compatibility with iOS, Android, Windows, Mac OS, and Linux devices Use up to 10 control devices (tablets, phones, PCs) simultaneously Legendary Harman Signal Processing from dbx, Digitech, and Lexicon Fully recallable and remote-controlled mic preamps 4-band Parametric EQ, High-Pass Filter, Compressor, De-esser and Noise Gate on input channels 31-band Graphic EQ, Noise Gate and Compressor on all outputs Real-Time Frequency Analyser (RTA) on inputs and outputs 3 dedicated Lexicon FX effects processors: Reverb, Delay and Chorus Subgroups, Mute Groups, View Groups, and more mixer controls Show/Snapshot recall with channel safes and security lockout 2-channel USB audio playback and recording Password-protected Access limitation system Sync ID (multiple browser windows staying in channel Sync)