Pre-owned Mxr micro amp in great condition, complete with box
 
The Micro Amp allows you to boost your signal with a preset amount of gain up to +26dB.
This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).