Control Unit W/Firmware, JellyBOX Original, Cold Bed

<p>"This is a drop-in replacement for a JellyBOX 2 control unit with COLD bed. It contains an Arduino Mega 2560, RAMPS board, and all needed stepper drivers and also comes pre-installed with appropriate firmware.</p> <p>This is the fix-it-all solution for all sorts of problems, and a good backup to have on hand for anyone who values their time and uptime."</p>