Put the problem on the map
Bayfront Park appears in the city directory at 301 Biscayne Boulevard. A recognizable destination like that can explain the general area, but it cannot locate a car left in another lot or a side entrance to an apartment building.
Give the numbered address before describing what is nearby. The Downtown Miami notes discuss building-side details.
Tell us what changed
Perhaps a key that worked yesterday now stops halfway, or you can enter the building but not your home. Describe that sequence in ordinary language.
You do not need to know the name of the mechanism. For a troublesome private entrance, the lock repair page explains which observations are useful before anyone recommends work.
Make the call useful
Have the property contact ready if another person must approve the job. A vehicle request needs its make, model, year and present parking location instead.
Call with those details to check the supported task and availability for your Miami address. Ask what the estimate includes and what may depend on seeing the installed hardware.