Acquired from a reliable source, a high end hobbyist private lab. No means to test. We are surplus equipment dealers and do not have the ability or knowledge to test equipment for functionality beyond plugging it in and describing what we observe as best we can. 2 You are purchasing used equipment – most is untested as stated in our description. Please reach out to us directly if there is a problem. We are quick to respond and resolve. Used items have a 30-day return. We have no knowledge of the history of the equipment. We do not have power cords to provide unless they are attached to the item or unless stated that they are provided. If one is pictured it is for testing purposes only unless it is attached or stated that it will be included. Our items do not come with manuals or any other accessories unless shown and/or stated that they are included.