ATHEARN "BLUE BOX" EMD F7A & B UNIT SET.THE A UNIT HAS BEEN FITTED WITH A MRC "SHEER BRILLIANCE" SOUND DECODER WITH A MASSIVE SPEAKER INSIDE (BLOW THE SOCKS OFF PEOPLE WITH THIS HORN ! ).THE B UNIT IS FITTED WITH A DIGITRAX NON-SOUND DECODER AND IS SPEED MATCHED TO THE 610.UNITS ARE NOT PERMANENTLY COUPLED,SO SPLITTING AND RUNNING WITH OTHER CONSISTS IS POSSIBLE.UNITS HAVE BEEN DETAILED AND WEATHERED.THE A UNIT  HAS BEEN REPOWERED WITH A SAGAMI CAN MOTOR AND HAS A WORKING ROTATING BEACON LIGHT.STANDARD ATHEARN SINTERED IRON WHEELS ON THE B,NEWER RTR WHEELS ON THE A.