Featuring a whopping 70+ built in effects, the B1XFOUR is an ideal solution for the bassist looking to expand on their sounds and increase their instrument's versatility. In addition to its impressive glut of effects, the B1XFOUR also boasts 9 amp models based on genuine classics and industry standards, looper, expression pedal, and an auto save function which guarantees your patches, levels, and effects will be preserved when you power off your B1XFOUR.