Zoom B1x Four Bass Multi-effects Processor With Expression Pedal.

It offers over 70 built-in effects, including overdrive, distortion, chorus, reverb, delay, compression, and more. It includes 9 amp models that simulate classic bass rigs. Up to 5 effects can be used simultaneously, chained together in any order. It features a built-in drum machine with 68 rhythm patterns and a looper function with up to 30 seconds of recording time