aux input, optional SDHC card can store over 16 hours (with optional 8GB or higher SDHC memory card) of CD-quality audio in 99 additional memories (198 total), slow down or speed up any loop without changing pitch, 44.1kHz sampling rate (CD quality), 4x heavy-duty metal footswitches for looping and loop selection, finish and fade), automatic recording, 3x stop modes (stop, CD-quality loops in 99 internal memories, metronome with multiple rhythm sounds and time signatures, balanced XLR mic input, record rhythm loops and solo over them on the fly, reverse playback, USB port, includes power supply.