High-Performance Digital-Audio CD-R"s! Premium, Professional Grade Digital-Audio CD-R Media are capable of record speeds from 1X to 4X (and, compatible in most computer cd recorders at 52X, too!). * These are the media needed for recording on Philips, Pioneer, Harman/Kardon, JVC & Marantz (and others) brands of home CD-Recorders. Known as Digital-Audio, these are the media supported by consumer audio-only cd-to-cd home recorders. * These consumer audio-only CD-R discs meet the standards of the Audio Home Recording Act (AHRA) of 1992, which requires a royalty to be paid by the disc manufacturer to the music industry. These CD-R"s support the Serial Copy Management System * 80-Min Music (Digital-Audio) CD-R"s. Shiny-Silver top surface, lite-green record surface. * Sold in shrinkwrapped 100-disc pak"s, no cakebox.