This is a Finisar 2GB 850nm Fiber Optic Surface Mount Transceiver with a part number of FTRJ8519U1GNL-EM. They are new and have never been used. They were originally bulk packaged and we have repackaged them for individual sale. They are being sold as pictured and do not include any additional parts or accessories. Please note that these are surface mount modules and not a standard Mini-GBIC.