Each of the facades of the three tower blocks has custom individually addressable surface mounted single color LED beacons mounted vertically on the facades.
French windows should have one pair of key mounted mortice security bolts or key operated surface mounted bolts.
This innovative approach avoids visually intrusive surface-mounted closers and invasive work to floors to fit floor-level closers.
Power sources can be surface mounted or placed in remote locations, such as inside the wall or ceiling or in an adjacent room or closet, however this type is more difficult to access.
A surface-mounted power feed is where the power enters the system.