Zoom B1X Four Bass Multi Effects Processor with Expression Pedal Speaker 2 dedicated output streams for bench 2 dedicated output streams for headphone monitoring Now made smaller editing and managing effects and patches● 68 built in rhythm patterns which can be used in conjunction with the Looper● 50 memory locations for storing user created patches● Auto Save function for automatic saving of all patch parameters● PRESELECT function allows silent patch selection while the current patch remains operational● Onboard chromatic tuner● Input jack accepts standard mono bass guitar cable (both active and passive instruments supported)● Auxiliary input jack for connection of personal music players● Output jack for connection to amp or headphones● Lightweight and small enough to fit in your gig bag● Easily integrated into any existing pedal board● Runs on 4 AA batteries access ZOOM Guitar Lab’s additional library of downloadable effects