The Zebra FXR90 is an ultra-rugged fixed RFID reader built for industrial and outdoor deployment — mounting at dock doors, conveyor lines or warehouse portals to automatically detect UHF RFID-tagged items as they pass, without a person having to scan anything by hand. It reads UHF RFID only (no barcode imaging), has an integrated cross-polarized linear antenna built into the unit for straightforward single-antenna installs, and 4 external antenna ports for building out a wider multi-antenna coverage zone (e.g. a full dock door or portal) when needed.