This Action Pak 4300-139 Isolating Transmitter 4-20Madc 120V-Ac 0-1V-Dc Plug-In Relay is in good condition and is guaranteed to be fully functional. This relay came from a local business that had surplus inventory. Item is most likely in unused condition but was listed as used due to lack of factory packaging and signs of storage. We urge customers to view all photos as they show overall condition, included accessories and useful information. Please feel free to contact us with any questions.