The Aleratec DVD/CD Copy Tower Pro HS stand alone duplicator incorporates the latest 20x DVD recorders for simultaneous DVD copies at up to 20x speed or simultaneous CD copies at up to 48x, without a computer. A DVD/CD Copy Tower Pro HS can also copy to DVD-RAM media and copy up to 8.5GB on Double Layer Media offering the broadest format compatibility available. DVD/CD Copy Tower HS has a built in removable 160GB hard disk drive to store frequently used source disc images and maximizes copying stability especially in high speed copying operations. The removable drive can be kept in a safe place so unauthorized users cannot view or copy your data. The DVD/CD Copy Tower Pro HS can also make a quick copy of a DVD/CD, by just placing the master disc in one of the DVD/CD Recorders, loading in blank media for the number of copies you want and pressing "Copy". The towers will sense the master disc and automatically make the copies. The distinctive "professional black" design fits perfectly in any environment, from the computer room to the Hollywood Studio.