Source Audio Programmable EQ, stompbox, EQ, 7 separete free programmable frequncies (125Hz - 250 Hz - 500Hz - 1kHz - 2 kHz - 4 kHz - 8kHz), +/- 18dB pro Band, optional frequency band at 62Hz for bass, hardwire True Bypass, midi, 56 Bit digital processor, 24 Bit converter, aluminium chassis, dimensions (h x w x d): 51 x 64 x 114 mm, 9V battery or 9V power supply is needed