Roland DJ-505 2-Channel 4-Deck DJ Controller For Serato DJThe Roland DJ 505 is a two channel, four deck Serato DJ controller that blends the advanced performance capabilities of Serato DJ with the legendary sounds and sequencing of Roland's TR 808, TR 909, TR 606*, and TR 707 drum machines. The DJ 505 gives you the tools to move beyond mixing music to creating beats and rhythms on the fly that sync to your Serato DJ tracks, enabling the creation of unique transitions, live remixes, beefed up classic tracks,