This is a Zebra MC3390XR rugged handheld RFID/barcode computer, the same UHF RFID-equipped, pistol-grip device family as the 29-key model above, but configured here with a 38-key keypad and a 'GM' variant designation (typically indicating a specific radio/regional configuration in Zebra's naming, which the listing doesn't spell out further). It combines a linear UHF RFID antenna for tag reading with Zebra's SE4850 extended-range 2D imager and 802.11 a/b/g/n/ac Wi-Fi, and ships with an extended-capacity battery for all-day use. As with its sibling SKU, it's built for warehouse, logistics and inventory-tracking operations that need combined barcode-and-RFID data capture on the floor, not general consumer use.