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Unit has never been used. Purchased new. From Sweetwater:The Zoom B1X FOUR’s onboard drum machine lets you play your bass to 68 different drum patterns in a variety of time signatures, such as 4/4, 3/4, and more. For live performances, two performance modes allow you to switch patches and effects seamlessly. At home or in the studio, put your pedal on the desktop to easily dial in your sounds and settings — the auto save function instantly backs up your patches and level settings as you create them! The B1X FOUR operates on four AA batteries or the optional Zoom AD-16 AC adapter; you can even run your pedal via USB bus power.Built-in expression pedalB1X FOUR offers over 70 built-in effects9 amp models for simulating classic rigsUp to 5 effects can be used simultaneously, chained together in any orderBuilt-in expression pedal for control over certain parametersLooper for recording up to 30 seconds / 64 beats of CD-quality audioZoom Guitar Lab software for creating, editing, and managing effects and patches68 built-in rhythm patterns that can be used in conjunction with the looper50 memory locations for storing user-created patchesAuto save function for automatic saving of all patch parametersPre-select function allows silent patch selection while the current patch remains operationalOnboard chromatic tunerInput jack accepts standard mono bass guitar cable (both active and passive instruments supported)Auxiliary input jack for connection of personal music playersOutput jack for connection to amp or headphonesLightweight and small enough to fit in your gig bagEasily integrated into any existing pedal boardRuns on 4 AA batteries, with alkaline battery life of 18 hoursUSB port for firmware updates, power and connection to Zoom Guitar LabOptional AC adapter (Zoom AD-16)

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