The "Wave Music System" was released in 2004 as a replacement for the Wave Radio/CD. It had revised speakers, a tapered waveguide for each speaker, and could play MP3 format CDs. The "Wave Music System II", released in 2005, was nearly identical to its predecessor, and the 2007 "Wave Music System III" added Radio Data System (RDS) and a large snooze button to the top of the unit. Accessories included a CD changer (released in 2005) and an iPod dock (released in 2006).