This cable is designed to plug into a ZR-100 Active RFID reader.  The other end is designed to mount onto the outside of a box.  It is an RG-358 cable with an MMCX connector on one end and a bulkhead-mount RP-TNC connector on the other end.  The RP-TNC conector is a standard connector which is commonly used for Wi-Fi access points at 2.4 Ghz.