Does Spectranet Work In Benin City?- No! Spectranet is yet to cover many places in Nigeria. At the moment the company is still available from 4 locations in Nigeria.
Spectranet is not yet in Benin or any part of Edo State to answer your question.
However, if you move to any of these places Abuja, Ibadan, Lagos and Port Harcourt you will be able to use Spectranet in those cities.