Lots of gain with just a single control!!!
Dunlop. MXR M-133 Micro Amp Pedal. Off White with black dial. Dimensions are 4 1/4" L x 2 1/4" W x 1 1/2" D. In original box.
Adding a preset amount of gain with just a single control, the Micro Amp is a great way to boost your signal for lead work or adjust between two different guitars with unmatched output (i.e. humbuckers to single-coils). It can also provide a permanent boost in a long effects chain where signal drop off is a problem.
Power: Dunlop ECB003 AC Adapter or Single 9 volt battery.