Like its little brother, the Zoom B2, the Zoom B2.1U comes with seven effects modules with 45 effects types, an ultra-wide frequency response, built-in drum machine with 40 rhythm patterns and integrated chromatic tuner. And Zoom didn't stop there, the B2.1U adds an expression pedal to get the most out of your Zoom-tones, a USB interface in included for recording purposes, and the Cubase LE software is included as well.