I saw this oddity at The Cheeseburger Restaurant in Honolulu, Hawaii
I regret not getting closer so that I had a photo of the label that was legible.
The size of the antennas on this unit makes me think it’s not for Wi-Fi but something else. Perhaps for their hand-held order entry tablets or point of sale? On that point though, why not use Wi-Fi for those devices? So maybe it is Wi-Fi afterall.