Both ceiling alarms can be used with all new and existing GEZE hold-open devices, e.g. RSZ 6; TS 5000 R; TS 5000 R-ISM; TS 4000 R, etc. (exception: products based on RSZ 5 technology) and tested in accordance with EN 14637. Line monitoring is already prepared by the resistance integrated into the base. As a result, there is no additional expenditure on wiring. Easily accessible fixings and a convenient turn lock guarantee simple assembly and maintenance.