U2 says its long-rumored album of collaborations, U2: Duals, will finally be released exclusively to their fans through the band's official website and will not be sold in stores or online.

The collector's-edition set is part of a subscription package sold to fans through the band's website and will be produced only in limited numbers. The set collects three decades' worth of collaborations with other artists.

Although the final track listing for the set has not been revealed, it is likely to include collaborations with Bruce Springsteen, B.B. King, Johnny Cash, Frank Sinatra, Jay-Z and others.