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Hardware mp3 players became popular. The Rio Volt model was released in the United States around 2001 and was a popular mp3 player.[[File:RioVoltSP150.jpg]]The RioVolt SP150 was an mp3 player that played MP3 and WMA CD's, CD-R, CD-RW and CD's. 16 minute skip protection. Up to 20 hours of playtime on 2 AA batteries. Repeat and shuffle play modes. Easy navigation on lighted, 3-line text display.The evil RIAA sued the maker of the Rio and many other hardware mp3 manufacturers which inhibited their expansion on the market. Later as Apple become dominate with their iPod line of products, the competitors such as Rio died off. Today the market consists mostly of overpriced DRM embedded Apple devices and cheap Chinese made knockoffs. I recommend the cheap Chinese made Knockoffs.