ZOOM MULTI STOMP MS-50G Easy-to-use interface includes LCD, footswitch, and analog-style cursor keys/parameter knobs 55 effects types (47 stomp box effects, 8 amp models) can be used in any combination Use up to six effects simultaneously, 30 preset patches ready for immediate use, Create and store up to 50 original patches Integrated auto-chromatic tuner, Tap tempo function, 1/4"input jack, two 1/4"output jacks Up to seven hours of operation using two AA batteries (included), AC (adapter sold separately) and USB bus powered