Fender(R) 235-1000-000 GDEC(R) Junior Combo-Amp Key selector knob allows 14 different keys; Bass Off may be selected to allow only the drum sounds to be activated Tempo knob allows settings from 30 to 240 bpm Separate controls for guitar volume and backing loop volume MIDI connector allows streaming files from a computer 1/8 aux in allows jam-along capability with external CD or mp3 player