Used Pump Node 2 pulled from working dispensers, tested and fully functional. Loaded with 4.0.31 software ***MAKE SURE THE DOOR NODES ARE UPGRADED TO A COMPATIBLE SOFTWARE VERSION BEFORE INSTALL OR THE PUMP NODE WILL NOT SEE THE DOOR NODES. MEMORY DUMP AND ERROR CODES WILL RESULT IF DOOR NODES ARE NOT UPGRADED TO A COMPATIBLE VERSION BEFORE INSTALL. PUMP CONTROL NODE CAN ALSO BE DOWNGRADE TO LATEST 3.X.XX SOFTWARE VERSION TO WORK WITH OLDER DOOR NODE VERSIONS IF YOU ARE UNABLE TO UPGRADE THE EXISTING DOOR NODES AT THE TIME OF INSTALL***