The Zebra MC3390XR is a rugged, pistol-grip handheld mobile computer built for warehouse, logistics and asset-tracking environments where staff need to scan constantly through a shift. This variant adds UHF RFID reading via a linear antenna, letting it read RFID tags at range in addition to standard barcode scanning, and uses Zebra's SE4850 extended-range 2D imager for long-distance barcode capture. It runs on 802.11 a/b/g/n/ac Wi-Fi for real-time connection to warehouse management systems, has a 29-key keypad for data entry, and ships with an extended-capacity battery for full-shift use. It's an industrial device, not a consumer product, and is typically deployed fleet-wide by logistics and retail-distribution operations.