Description de chez Amazon USA : - Single stompbox design. Easy-to-use interface includes LCD, footswitch, and analog-style cursor keys/parameter knobs.<br /> - Create and store up to 50 original patches, 30 preset patches ready for immediate use.<br /> - 58 effects types (52 stompbox effects, 6 amp models) can be used in any combination. Use up to four effects simultaneously.<br /> - Integrated auto-chromatic tuner, Tap tempo function, 1/4-inch input jack, two 1/4-inch output jacks.<br /> - AC (adapter sold separately) and USB bus powered, Up to seven hours of operation using two AA batteries (included).<br />