The American Audio UCD-200 Dual MP3/CD Player installs into a standard 19" rack and supports CD, CD-R and MP3-CDs. There are also 2 USB ports for mixing MP3s from external storage devices such as a USB stick, a USB SD Card reader, or a compatible external hard drive. Depending on the current operating mode, 2 jog/shuttle wheels are available to serve 3 different functions: slow frame search control, momentary pitch bend, and scratch effect. The unit"s pitch controls are variable, and Tempo Lock allows for seamless beat mixing without altering the tonal pitch of the track. Intuitive controls and a large LCD display will make this a welcome addition to any DJ rig. The UCD-200 Dual MP3/CD Player includes database management software that enables you to search for your files by Title, Artist, Album, and Genre. (PC Only)19-inch rack mount dual CD/MP3 Player Plays MP3, CD, CD-R & CD-RW discs LCD Displays shows track name when a MP3 disc is played 2 USB music inputs (1 on front, 1 on rear) for external music sources (hard drive, MP3 Players, Thumb Drives, SD Cards with adapters) RCA Outputs Seamless Loop Auto & Manual BPM Counter +10 track advance button Mechanical Anti Skip Protection Quick MP3/CD recognition Pitch (CD Source): Hyper Pitch (+/-4%, +/-8%,+/-16%,+/-100%) Pitch (MP3 Source): (+/-4%, +/-8%,+/-16%) Tempo Lock Fader Q Start Bright LCD displays Single/Continue Mode and Time Remaining Frame search Jog Wheel control Power Consumption: 16W Includes American Audio Database Builder Program (PC Only See user manual for hardware requirements)