B1 FOUR offers over 60 built-in effects 9 amp models for simulating classic rigs Up to 5 effects can be used simultaneously, chained together in any order Built-in expression pedal for control over any parameter (B1X FOUR only) Looper for recording up to 30 seconds / 64 beats of CD-quality audio FOR ZOOM Guitar Lab software for creating, 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, with alkaline battery life of 18 hours USB port for firmware updates, power and connection to for ZOOM Guitar Lab NOTE:Not include battery! Not include AC adpter. Color:Red Material:Metal Package Contents: 1 * Guitar Processor