From the manufacturer:
When we developed the PDS 8000 looper pedal over twenty years ago, it looped eight seconds of audio. When we reinvented loopers in 2005 with the original JamMan®, over 6 hours worth of material could be stored on a removable media card. Now, DigiTech® has raised the bar with the new JamMan Stereo Looper with the ability to store 35 minutes of CD-quality loops in 99 internal memories as well as having an SD memory card expansion slot giving you the ability to store over 16 hours* of material in an additional 99 slots.
The JamMan Stereo also features true stereo looping, reverse playback, and a mic input making it perfect for backing tracks or DJ applications.
The JamMan Stereo features USB connectivity and will sync to DigiTech’s free JamManager™ software that organizes and saves your JamMan Stereo loops to PC or Mac. JamManager also lets you quickly create custom JamLists to take to your gig.