VHT i-66 Head, electric guitar head, 66W, 1x 12AX7 preamp tube, controls: volume, boost level with boost engange, tone, tone-link engage & master volume, back: footswitch jack for boost (not included, optional #260691), APP I/O input (to connect with CD, MP3, laptop or mobile phone), PC in, PC out, Aux in, Line out (adjustable), headphone in, extension speaker output, dimensions: whd 370 x 200 x 220mm