They (cellular/PCS repeaters or "enhancers") are entirely legal to own and operate as long as they are operated under authority of the licensee(s) whose signals are involved. They cannot be used legally on an independent, unlicensed basis. They are, in the eyes of the FCC, cellular or PCS transmitters.
If you're a Veriz> A quick web search comes up with
Well, the manufacturer seems to be playing fast and loose. The unit's FCC approval is valid only under Part 22 and 24, which require a license (i.e., you have to be the licensed cellular or PCS operator whose signal is involved), but the manual says it's approved under Part 15, which is for unlicensed operation.
I have seen similar deceptive FCC "approvals" with other cellular/PCS enhancers. The test report for the unit under the Part 22/24 rules is at
the FCC certification grant is available at
Michael D. Sullivan Bethesda, MD (USA) (Replace "example.invalid" with "com" in my address.)