The Zebra MC3390xR is a rugged handheld mobile computer built around a pistol-grip UHF RFID reader, designed for warehouse and inventory teams that need to scan both barcodes and RFID tags from long range without swapping devices. It combines a linear RFID antenna for extended-range tag reads with Zebra's SE4750MR 2D imager for conventional barcode scanning, an extended-capacity battery for full-shift use, and Google Mobile Services (GMS) support on 4GB of memory. Wireless connectivity is 802.11 a/b/g/n/ac. Its 29-key keypad and rugged housing point to receiving, cycle-counting and asset-tracking roles in distribution centres rather than retail front-of-store use.