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The OS-350 is an outdoor non-backup siren combining a loud acoustic siren with a flashing light. The flashing light helps to locate the active siren. Optional piezo-electric siren (ACM-OS360). The siren’s housing is made of mechanical, weather and UV resistant plastic. The electronic circuit board is protected against air humidity by double-layer varnish. The device is protected by two magnetic tamper switches. If higher security is demanded, we recommend using the OS-360 or the OS-365 backup outdoor siren.

Specifications
- Power supply: 10 to 17 V DC
- Consumption: 250 mA / 12 V
- Siren: piezo-electric,112 dB /1 m, With second piezo-electic siren (ACM-OS360) 116 dB /1 m
- Enclosure: IP 34
- Security grade: 3 (with internal cover) EN 50131-1
- Security grade: 2 (without internal cover) EN 50131-1
- Environmental: class IV -25 to +60°C
- Dimensions: 230 x 158 x 75 mm