The Business Audio Music On-Hold System (GDI-USBM10) is an on-hold audio player for use with any telephone system such as PBX's, IPBX's or Key Phone systems. The music on hold player is designed for ease of use. Simply plug the Grace Music and Messaging on Hold Player into your telephone systems' audio input jack (typically marked as 'music on hold') via the included audio cable then insert the included USB thumb drive and the fully licensed music for businesses will automatically start playing. If you like to upgrade or change the music that comes with the Grace Music On-Hold Player use the included Grace Music Master Recording Software for Windows PC's and create your own personal music mix. The Grace Music Master software even allows you to record your own personal messages and effortlessly fade in/out the messages into your mix. Once completed and saved on your computer, drag and drop the desired recordings to the USB drive then insert the drive into the Grace Music On-Hold player and the music automatically starts playing.