Valve testers helped technicians tell the condition of tubes being used in radios, radars and other electrical equipment. Even new tubes were sometimes defective, therefore, valve testers were a safe method of locating faults and reducing instrument downtime. We haven't been able to test this RP360 and check if its operation is safe or functional. We would thus advise you to service it by consulting an expert in order to ensure its safe performance in case you decided not to use it as decoration alone. Otherwise, you may keep it unplugged and use it as a rare decoration item that will attract the attention of your friends or onlookers.