Zoom B1Four Bass Multi Effect, Multi-Effect Pedal for Electric Bass, 65 Internal effects, 9 Amp simulations, Up to five effects can be used simultaneously and in any order, Looper with a length of up to 30 seconds / 64 beats in CD quality, Guitar Lab software for creating, editing and managing effects and patches, 68 Internal rhythm patterns, 50 Memory locations, Swap function for easy patch management, Automatic storage of all patch parameters, Integrated chromatic tuner, Auxiliary input jack, Output jacks for connection to the amplifier or headphones, Backlit LCD with contrast adjustment, Lightweight and compact for transportation inside a gig bag, Easy integration with existing pedal boards, Running time up to 18 hours, USB port for firmware updates, power supply and connection to Guitar Lab, Controls: Bass, Mid, Treble, Volume, Pushbuttons: Rhythm, 5 effect slots, Looper, Setting, Memory, Switches: Effect Up, Effect Down, LED: Effect On, Foot switch: Looper, Tuner, Input and output: 6.3 mm jack, Mains adapter connection, USB, AUX In, Power consumption: 500 mA, Runs on 4x AA batteries or power supply with a 9 V DC mains adapter (not included, suitable optional mains adapter: Article number #105835#), Dimensions (W x D x H): 156 x 130 x 42 mm, Weight: 340 g