Three stomps one pedal Evolution of tube amp simulation Super-real amp modelling 94 stompbox models The newest generation of DSP ZFX-IVLooper function with 40-seconf phrase recordingoverdubbing USB audio interface for DAW recording 100 versatile effects on-board Integrated drum machine Balanced XLR output for DI use Output modes for stage or studio Accurate real-time tuner function Worlds fastest patch change speed 1ms 6 hours continuous operation from 4 AA batteries Can be powered with an AC power adaptor or USBDimensions D x W x H 170 x 234 x 54 mm Weight without batteries 1.2kg Zooms G3 Guitar Effects & Amp Simulator combines the ease of a stompbox pedalboard with the power of a multi-effects processor & USB (Universal Serial Bus) audio interface. With complete control over individual effects & amp modelling you can change your tones on the fly for both stage & studio.