These APs can be wall or ceiling mounted. You can also mount them above the ceiling but that’s not recommended since you’ll be hindering signal propagation by doing so. It is usually best to mount APs on the ceiling.
With regards to signal profiles, I think you mean radiation patterns. If that’s the case this is something that needs to be provided by the manufacturer but Peplink hasn’t made that information public as far as I know.
Although some vendors list “range” values for some of their products, those mean nothing and are only there to take advantage of people’s misconceptions about wireless networking. That’s because range isn’t a feature or characteristic of an AP or radio but a function of several variables like the environment, configurations, and the specific client device in question.
Hope this helps.