Simplex 59VO-APPLWR TrueAlert ES LED Addressable Strobe HTRI-M (500-034000) Model OP121 from Siemens -

Model OP121 from Siemens - Fire Safety is a photoelectric smoke detector with microprocessor-controlled

The EVS-50W has its own power supply with battery backup and four speaker circuits which can be expanded to eight speaker circuits with the optional EVS-CE4

The detector bases are low-profile

The SK-ZONE allows a Silent Knight FACP to interface and monitor two-wire conventional smoke detectors

Simplex 59VO-APPLWR TrueAlert ES LED Addressable Strobe HTRI-M (500-034000) Model OP121 from Siemens -Simplex 59VO APPLWR TrueAlert ES LED Addressable Strobe Appliance Electronics, Wall Mount, 15 30 75cd, Red (order cover separately)