M133 MXR MICRO AMP M133 Micro Amp This device adds a preset amount of gain which is preset using the single control. Boost your signal for lead work, or for changing between guitars with mis-matched outputs.

This device adds a preset amount of gain, using a single control. With a guitar, this lets you boost your signal for lead work, adjust between two different guitars with unmatched output (i.e., humbucker to single coils), or it can supply a permanent boost in a long effects chain where signal drop off is a problem. 

Power: Single 9 volt battery or Dunlop ECB-003 AC adapter 

Controls: Footswitch toggles amp on/bypass (red LED indicates on) Gain knob adjusts total output volume when micro amp Is engaged 

4-3/8" x 2-3/8" x 1-1/4" 0.9 lbs. White