Zoom MS-60B Multi-Stomp Bass Pedal Single stompbox design. Easy-to-use interface includes LCD, footswitch, and analog-style cursor keys/parameter knobs. Create and store up to 50 original patches, 30 preset patches ready for immediate use. 58 effects types (52 stompbox effects, 6 amp models) can be used in any combination. Use up to four effects simultaneously. Integrated auto-chromatic tuner, Tap tempo function, 1/4-inch input jack, two 1/4-inch output jacks. AC (adapter sold separately) and USB bus powered, Up to seven hours of operation using two AA batteries (included).