DJTECH PREAMP1800 8-Channel Preamplifier with 2-In/2-Out USB Interface 2-in/2-out USB interface, Enables playback and recording from a USB thumb drive up to 32GB, plus a simple connection to your PC or Mac. Also compatible with select CD players, vinyl turntables, microphones and more. 1U rack size for a compact design. Include RCA, 1 phono and one 1/4&#34; microphone with level control. Mute, low-cut and mono switches, Allows simple one-touch control over the preamplifier. Software package Includes Magix Audio Cleaning SE for PC and Audacity for PC and Mac