Meet the ultimate palmtop guitar companion and recording studio. Only slightly larger than an iPod, the tiny-yet-powerful MICRO BR is a dream for musicians on the go. The MICRO BR offers four simultaneous playback tracks (plus 32 V-Tracks), MP3 compatibility, onboard multi-effects, built-in rhythm patterns, a tuner, USB, an SD Card slot, and more. No guitar case or gig bag should be without one!

• Ultra portable, only slightly larger than an iPod
• 4-track playback, 32 V-Tracks
• Loads and plays MP3 files
• Multi-effects onboard; dedicated guitar input
• Time-Stretch and Center Cancel features (including MP3 files)
• 293 rhythm patterns
• Built-in tuner and microphone
• USB port for data transfer
• SD Card slot for recording media, 128MB card included

Read more here.