The M-Audio M-Track Hub is a USB Monitoring interface with built-in 3-port hub. The M-Track range from M-Audio is a line that focuses on audio recording and monitoring interfaces. The M-Track hub features studio-quality audio with 24-bit resolution on playback with 2 balanced 1/4 main outputs and a dedicated large metal level control. The hub has the ability to power up to three separate USB MIDI devices and it comes complete with independent level control.