Fishman Aura Spectrum DI - high quality studio microphone simulation with new AURA technology, 24bit A/D/A, 128 AURA sound images, preamp with balanced DI output (XLR). Controls: volume, blend, image select, 3-band EQ, adjustable compressor. FX loop, integrated chromatic tuner with bypass and mute function, 16 user presets. Advanced editing via AURA Image Gallery III software (included) over USB, powered via 9V battery or optional power supply ((# 108096) (not included), Dimensions: 134 x 54 x 143mm